Explainer

Unreliable Narrator Books: What the Term Means and Ten That Show It

Most lists treat this as one trick with fifty examples. It is at least four different devices, and they produce completely different books. Here is the definition, the mechanisms, and one or two of the best of each.

Published by Simran Mehta Updated How this guide was made

Cover of The Forty-Year Passenger by Simran Mehta: cream serif lettering on deep oxblood, cut through by a lit train.

Book Three · The Train Between Worlds

The Forty-Year Passenger

A novel of a lost brother, a vanished mother, and the woman who has been mapping the train since 1981.

Abel Quist has been aboard the train fifteen years. He has opened eleven doors in that time and mapped the rest, and considers this restraint. He carries tea every morning to a brother who no longer knows they are related. He is scrupulously accurate about the train, and the book is told from his point of view with Verity Sloane’s forty-three notebooks threaded through it. Those notebooks are the document. Like Tony Webster’s letter, they record a version of events that does not flatter the narrator, and the second half of the book is an argument between his account and hers.

So the book sits squarely in the “deceiving themselves” column, with Stevens and Tony Webster. It is not a twist book. There is no lie to the reader, no forged diary, no last-chapter reversal, and the narrator’s own memory is intact; the forgetting belongs to his brother. A reader who came here from Roger Ackroyd or Gone Girl will not get that jolt. What they will get is nearer to Audition: two accounts of the same fifteen years, argued rather than revealed, except that this book does eventually decide which of them was right, and it is not the one you expect.

A standalone novel — new readers can start here

Short answer

An unreliable narrator is one whose account the book itself does not endorse: the reader is meant to see past them. The term is Wayne Booth’s, from The Rhetoric of Fiction (1961). If you want the narrator deceiving themselves, read The Remains of the Day or The Sense of an Ending. If you want one lying to you on purpose, read Lolita, The Murder of Roger Ackroyd or Pale Fire. If you want a mind that cannot hold the facts, read The Yellow Wallpaper, Elizabeth Is Missing or Room. For the newest variation, Katie Kitamura’s Audition (2025).

What to expect from The Forty-Year Passenger

On the unreliability specifically:

Same as The Remains of the Day
A narrator accurate about everything except his own conduct, and a book that lets you see it before he does.
Same as The Sense of an Ending
A second account in someone else’s handwriting that corrects the narrator’s. Here it is forty-three notebooks rather than one letter.
Different
No reveal and no lie. If you want to be fooled, this is not that book; the unreliability is texture, and the argument is on the page from the moment Verity is found.
Tone
Cool, exact, morally argumentative. The antagonist is never quite a villain and argues her case at length.
Content notes
Dementia-like forgetting in a sibling, a missing son, exploitation of vulnerable people.
Reading order
Book Three, written as a standalone; the train’s rule is explained afresh.
Formats
Kindle and paperback. Free to borrow with Kindle Unlimited.

What an unreliable narrator is, and what it is not

The phrase was coined by the critic Wayne C. Booth in The Rhetoric of Fiction (University of Chicago Press, 1961). His definition is worth having exactly, because the popular version has drifted: “I have called a narrator reliable when he speaks for or acts in accordance with the norms of the work (which is to say, the implied author’s norms), unreliable when he does not.”

Notice what that does not say. It does not say the narrator lies. Booth’s test is distance: the gap between what the narrator believes and what the book, taken whole, wants you to believe. Most unreliable narrators never tell a lie. Stevens in The Remains of the Day is scrupulously accurate about every fact and wrong about what the facts mean. Jack in Room reports everything and understands almost nothing. Maud in Elizabeth Is Missing is honest and cannot retain what she was told an hour ago. Booth called the usual case inconscience: the narrator is mistaken, or credits himself with qualities the author denies him.

William Riggan’s 1981 study sorted first-person unreliables into four figures, and his title lists them: Pícaros, Madmen, Naïfs, and Clowns. That typology is still the standard one and it is useful, but for choosing what to read next it helps more to ask three plainer questions of each book. What kind of wrong is the narrator: withholding, self-justifying, impaired, naïve, deliberately deceiving you, or standing between you and someone else’s text? When is the reader meant to catch on: the first page, the middle, or the last chapter? And once you have caught on, does the book ever confirm it, or leave you holding two accounts? Those three questions are the columns of the table below, and they will tell you more about whether you will like a book than any list of fifty titles.

One more distinction, because it decides everything about the reading experience. In some of these books the unreliability is a reveal: a single moment where the floor goes, after which the book is a different book. In others it is a texture: you know from the first page that the narrator is not to be trusted, and the pleasure is in the widening gap. Thrillers are built on the first. The books people still argue about thirty years later are mostly built on the second.

Start here: which of these do you actually want?

The three-way split that matters is not who the narrator is but who is being fooled.

  1. I want the narrator lying to me, and I want to be fooled properly

    You want a reveal. The narrator is in control of the account and is using that control against you. The classic is a detective story where the person holding the pen has a reason to leave things out; the formally extreme version is a commentator who annexes someone else’s poem. Read nothing about these books beforehand, including the back cover.

    The Murder of Roger Ackroyd · Pale Fire · Lolita

  2. I want the narrator lying to themselves, and I want to watch it happen

    You want texture, and this is the saddest kind. Nothing is hidden from you; everything is hidden from the narrator. You will be ahead of them by page thirty and stay there, and the ending is not a twist but the moment they nearly catch up. This is the branch The Forty-Year Passenger belongs to.

    The Remains of the Day · The Sense of an Ending

  3. I want a narrator who cannot be trusted with the facts, through no fault of their own

    Illness, age or childhood. The narrator is doing their honest best and the reader assembles the truth from what they let slip. This branch is closest to the “being lied to” narrators of Never Let Me Go and Piranesi, but the manager here is the narrator’s own mind.

    The Yellow Wallpaper · Elizabeth Is Missing · Room

  4. I read Gone Girl and want another one exactly like it

    Then, honestly, you want a thriller with a mid-book turn, and the shelf for that is long: The Girl on the Train, Before I Go to Sleep, We Were Liars. The one book on this page that will give you the same jolt is Audition, and it will then refuse to tell you which half was true. See the counterweight section for why Gone Girl is the wrong first example of this device, even though it is a very good book.

    Audition · Gone Girl

At a glance: mechanism, timing, and whether the book confirms it

The middle column is spoiler-safe by design. Knowing that you are meant to see through a narrator early is not a spoiler; it is the reading instruction.

BookHow the narrator is wrongWhen you are meant to catch onDoes the book confirm it?
The Remains of the DayWithholding; self-deception about his own conductEarly, and you stay aheadObliquely, on the last evening
The Sense of an EndingSelf-serving memoryMidway, when a document surfacesYes, twice, with one step left to you
LolitaAdvocacy: a case argued in beautiful prosePage one; the foreword tells youYes, by the narrator himself
The Murder of Roger AckroydDeliberate omission by the person holding the penThe last chapters, if at allCompletely
Pale FireMediation: a commentator annexing another man’s poemThe foreword, then deepeningNever plainly; the index comes closest
The Yellow WallpaperA mind coming apart under someone else’s managementImmediately; she tells youYes, and disputes what it means
Elizabeth Is MissingDementia; she cannot retain what she is toldPage one; announcedYes, both mysteries
RoomNaïveté; a five-year-old reporting accuratelyPage one; you decode it before he doesYes; the second half is the world explaining itself
AuditionTwo accounts of one life, neither withdrawnThe exact midpointNo
Gone GirlA forged document presented as a diaryThe first page of Part TwoCompletely, and then it carries on without it

Riggan's four types map roughly: Stevens and Tony Webster are naïfs about themselves; Humbert and Kinbote are pícaro and madman; the Yellow Wallpaper narrator is the madman under duress; Jack is the pure naïf. Sheppard has no slot, which is why Christie's book caused the row it did.

Deceiving themselves: the narrator who withholds

The most durable kind. The narrator has the facts and declines to draw the conclusion, and the book’s whole art is letting you draw it for them.

  1. The Remains of the Day Kazuo Ishiguro

    1989 · 258 pages · Stevens, first person, written over a six-day motoring trip

    Closest match The withholder

    Stevens, butler at Darlington Hall, drives to the West Country in July 1956 to visit Miss Kenton, the former housekeeper, and tells you about his life on the way. He is accurate about everything: the 1923 conference his employer hosted to soften the Versailles terms, the two Jewish housemaids he dismissed on Lord Darlington’s instruction, the night his father died upstairs while he stayed on duty. He is also wrong about all of it, because the one word he cannot say about any of it is the true one.

    What you will only know from reading it: there is no reveal. You are ahead of Stevens by the end of the first day and you never fall behind, and it is not boring, which seems impossible until you are inside it. The unreliability is a texture, and it is the texture of a man describing the shape of a hole without once looking into it. The last chapter, on a pier at dusk, is the closest he comes, and it is about two sentences too far for him. If you have only seen the film, the book is colder and better, because the film cannot help letting you see Stevens’ face.

    How it ends
    He sees Miss Kenton, sits on Weymouth pier as the lights come on, and gets nearer the truth than he has ever been without quite arriving.
    Contains
    Antisemitism in the household’s history, discussed rather than depicted
    Skip if
    You want to be surprised; this book tells you everything on the first day and then makes you sit with it.

    Checked against: LitCharts summary, Wikipedia: publication and Booker facts

  2. The Sense of an Ending Julian Barnes

    2011 · 163 pages · Tony Webster, retired, first person, in two parts

    Strong match The rememberer

    Tony Webster, retired and reasonably content, remembers his schoolfriend Adrian, his university girlfriend Veronica, and how both of those ended. Then a solicitor’s letter arrives: Veronica’s mother has died and left him five hundred pounds and two documents, one of which has not been handed over. The second part of the book, twice the length of the first, is Tony finding out what actually happened forty years ago, and the first thing he finds is a letter in his own handwriting that is much worse than he remembered.

    This is the cleanest demonstration of self-serving memory in modern fiction and it is only 163 pages. Barnes does something Ishiguro does not: he introduces documents. The narrator’s version and the paper trail diverge, and the paper wins. The novel gives you its own thesis early, through Adrian in a history lesson, and then spends the rest of the book proving it on Tony. Its weakness is the final revelation, which some readers find you need a diagram for. Its strength is that Tony is not a monster, just ordinary, and you will recognise the way he has smoothed his past.

    “History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation.” Part One, the history lesson; Adrian attributing it to ‘Patrick Lagrange’

    How it ends
    Tony learns what his letter set in motion, and the last person he speaks to tells him he still does not get it.
    Contains
    Suicide, off-page and discussed; A learning-disabled adult, treated carefully
    Skip if
    You dislike endings that make you flip back to work out what was just confirmed.

    Checked against: Wikipedia: structure, Booker, plot, PopMatters on memory in the novel

Deceiving you: the narrator who is in on it

Here the narrator knows exactly what they are doing. The question is whether they are trying to persuade you, to hide from you, or to replace someone else’s story with their own.

  1. Lolita Vladimir Nabokov

    1955 · Humbert Humbert, first person, addressing a jury from custody

    Closest match The advocate

    A fictional foreword by “John Ray, Jr., Ph.D.” tells you, before the narrator has spoken, how it ends: the author of the manuscript died in custody before his trial, and the girl he calls Lolita died soon after. Then Humbert Humbert begins, and for three hundred pages the most seductive prose in English is put to work justifying the abuse of a twelve-year-old. He is not confused about the facts. He is arguing a case, to you, and the argument is the style.

    What you will only know from reading it: the book is not a trick, and there is no moment of discovery, because Nabokov has removed the possibility by telling you the verdict first. The unreliability is a pressure you feel on every page, the sensation of being charmed by someone you know to be lying, and noticing yourself being charmed. That noticing is the whole point. Humbert himself concedes the case late in the book, briefly, in a passage that is easy to miss because he has taught you to enjoy his evasions. Read it with the foreword and do not skip the foreword.

    “You can always count on a murderer for a fancy prose style.” Part One, ch. 1

    How it ends
    He finds her again, years later and grown, and the voice that has carried the book finally fails him.
    Contains
    Child sexual abuse, narrated by the abuser; Murder
    Skip if
    You cannot read a book that asks you to sit inside the abuser’s head; that is a reasonable position and there is no way round it here.

    Checked against: LitCharts summary, F. W. Dupee, NYRB, 1963

  2. The Murder of Roger Ackroyd Agatha Christie

    1926 · Dr James Sheppard, village doctor, first person, as Poirot’s Watson

    Strong match The accomplice

    Hercule Poirot has retired to grow vegetable marrows in the village of King’s Abbot. Roger Ackroyd is stabbed in his study. Dr Sheppard, the local physician, becomes Poirot’s assistant and narrates the investigation, with his sister Caroline supplying the village gossip. That is all that should be said about the plot, and it is more than most editions manage.

    What can be said about the method: Sheppard never lies. Every sentence he writes is accurate. The trick is in what a sentence chooses to leave out, and one particular pair of sentences, about a letter and a ten-minute gap, has been picked over for a century. In 1926 readers accused Christie of cheating; in 2013 the Crime Writers’ Association voted it the best crime novel ever written. The French critic Pierre Bayard wrote a whole book, Who Killed Roger Ackroyd?, arguing that Poirot got it wrong and proposing a different culprit, which tells you how much play the text has in it. This is the purest example of the reveal type: nothing is texture, everything is the last chapter. Read it once for the trick and once to see how it was done.

    How it ends
    Poirot assembles the household, and the narrator writes his final chapter knowing what he now has to put in it.
    Skip if
    You already know the solution; it is common knowledge and the book is mostly the solution.

    Checked against: Wikipedia: publication, controversy, CWA vote, LARB on rereading it

  3. Pale Fire Vladimir Nabokov

    1962 · Charles Kinbote, editor and annotator, first person throughout the apparatus

    Closest match The commentator

    A 999-line poem in four cantos by the late John Shade, with a foreword, a line-by-line commentary and an index by his neighbour and colleague Charles Kinbote. The poem is about Shade’s life, his dead daughter Hazel, and what might survive death. The commentary is about the exiled king of a northern country called Zembla, an assassin named Gradus, and how the poem is secretly about them. It is not. Kinbote knows this and cannot stop.

    This is unreliability as mediation: the narrator stands between you and someone else’s text and rewrites it as you watch. You will see what is happening within the first few pages of the foreword, and then the book keeps going down, because the question shifts from “is Kinbote mad?” to “who is Kinbote?” Mary McCarthy proposed an answer in 1962; Nabokov’s own diary endorsed it (a Russian professor called Botkin); Brian Boyd spent a book arguing for ghosts. The novel never says. Read the poem straight through first, then the commentary in order, and ignore the cross-references on a first pass. It is the funniest book here and the most formally extreme, and the index is a last act rather than an appendix.

    How it ends
    The commentary ends where the commentator was always heading, and the index says what the commentary would not.
    Skip if
    You want a story with a floor; this one has an apparatus instead.

    Checked against: LitCharts summary, Wikipedia: McCarthy, Boyd, Nabokov’s diary note, The Modern Novel on the authorship question

Cannot hold the facts: illness, age, and childhood

The narrator is doing their honest best. The reader assembles the truth from what they cannot see, and the effect is closer to helplessness than to suspicion.

  1. The Yellow Wallpaper Charlotte Perkins Gilman

    1892 · An unnamed woman, first person, in secret journal entries

    Strong match The patient

    A short story of around six thousand words, first published in The New England Magazine in January 1892. A woman is confined to an upstairs nursery for a summer “rest cure” by her husband John, a physician, and forbidden to write. She writes anyway. Over a summer of entries she studies the wallpaper, then sees a pattern in it, then sees a woman behind the pattern.

    Two kinds of unreliability run at once here, and that is why it belongs on this page rather than on a horror list. The narrator is ill and getting worse, so her account degrades in front of you. But the person who defines her illness, and decides what she may and may not do, has an interest in her staying quiet, and the story lets you hear his voice through hers. You are never in doubt that she is unwell; what you catch on to, a page or two in, is that nobody around her is trying to find out why. Gilman had herself been treated by the rest-cure specialist S. Weir Mitchell and wrote in 1913 that the story “was not intended to drive people crazy, but to save people from being driven crazy.” Free to read online; an hour, and it stays.

    How it ends
    The last entry is written from inside the pattern, and whether that is escape or the end of her is still argued.
    Contains
    Postpartum depression; Psychiatric coercion by a spouse
    Skip if
    You want a novel; this is a story, and its power is partly its length.

    Checked against: Wikipedia: publication, reception, the Mitchell claim, Gilman, ‘Why I Wrote The Yellow Wallpaper’ (1913), full text

  2. Elizabeth Is Missing Emma Healey

    2014 · 320 pages · Maud, 82, first person, present day cut with 1946

    Strong match The forgetter

    Maud is eighty-two, lives alone, and keeps finding notes in her pockets in her own handwriting that say Elizabeth is missing. Her daughter Helen is tired of hearing it. Threaded through the present is 1946: Maud’s elder sister Sukey, newly married, vanished, and nobody ever found out what happened. Maud cannot hold on to what she is told about Elizabeth for more than a few minutes, but she has held on to Sukey for seventy years.

    This is the unreliable narrator as a memory problem rather than a character problem, and Healey’s trick is structural: the reader is the only person in the book who retains everything, so you become Maud’s memory. You will work out one of the two mysteries long before she does, and you will watch her be told the answer, forget it, and set off again, which is far more painful than any twist. The 1946 sections are a good post-war domestic mystery in their own right. Its weakness is a slightly mechanical last act; its strength is that the dementia is written from inside without sentiment or horror, which is rarer than it should be. It won the Costa First Novel Award. For more narrators like Maud, see the dementia guide linked at the end.

    How it ends
    One disappearance turns out to have the ordinary explanation Maud has been given many times; the other does not, and she leads someone to it.
    Contains
    Dementia from the inside; A dead sibling; A funeral the narrator cannot follow
    Skip if
    You are currently caring for someone with dementia and want a night off from it.

    Checked against: Kirkus review, SuperSummary study guide, Emma Healey’s page for the book

  3. Room Emma Donoghue

    2010 · 336 pages · Jack, five, first person, present tense

    Strong match The child

    Jack is five and has lived his whole life in an eleven-foot-square shed with Ma. Old Nick comes at night, and Jack is put in Wardrobe. He names the furniture as if each piece were a person, watches television he believes is not real, and reports everything with total accuracy and no understanding. You will have decoded his situation by the end of the first chapter. He never will, quite, and the gap between what he says and what you know is the whole first half.

    What you only know from reading it: the second half, after the escape, is the better and stranger part, and it is where the device pays off. Once Jack is outside, the world starts explaining itself to him, and his narration becomes a record of a mind being enlarged too fast. Donoghue’s control of the voice is the achievement; the risk with a child narrator is cuteness, and she mostly avoids it by making Jack literal to the point of alarm. The escape sequence is as tense as anything in a thriller and there is no twist in it, because you know the plan and Jack does not fully. Booker-shortlisted in 2010.

    “I want to go back to Room and go to bed.” Soon after the rescue

    How it ends
    Jack asks to see Room one last time, and it is smaller than he remembers.
    Contains
    Captivity and sexual violence, off-page, overheard by a child; A parent’s suicide attempt
    Skip if
    Child narrators grate on you; this one is sustained for three hundred pages.

    Checked against: LitCharts summary, Wikipedia: Booker shortlist, publication, ANZ LitLovers review

The newest variation: two accounts, neither withdrawn

One recent novel adds a mechanism the older books do not have.

  1. Audition Katie Kitamura

    2025 · 208 pages · An unnamed actress, 49, first person, in two halves

    Looser match The double take

    An actress in New York is rehearsing a play called The Opposite Shore when a young man named Xavier asks to meet her and says he thinks he might be her son. She has no children. Her husband Tomas is placid about it. That is the first half. The second half begins with the same woman, the same husband, the same apartment, and Xavier is her son, moving back home, with a shared history the first half made impossible.

    No explanation is offered and none is coming. This is not a lie, not a delusion and not a twist in the usual sense: the book resets, and you have to carry both versions to the end. Kitamura’s sentences are precise and cold and the effect is genuinely unnerving, in a way that thriller reveals never quite manage because they always resolve. Some readers find the refusal to settle a cheat; I think it is the most honest treatment of the device on this page, because it makes you feel what unreliability actually is, which is not a hidden truth but the absence of one. It was shortlisted for the 2025 Booker Prize and was a Pulitzer finalist in 2026. Short enough for an evening, and you will want the evening.

    How it ends
    The play opens, and which of the two lives was the performance is left with you.
    Skip if
    You need the book to tell you, eventually, what really happened.

    Checked against: Harvard Review, Wikipedia: publication, Booker and Pulitzer, Booker Prizes reading guide

Why Gone Girl is the wrong first example, and still worth reading

Ask anyone for an unreliable narrator and Gone Girl is the first answer, and it is the top of the Goodreads list. It is also, on Booth’s definition, a slightly odd fit, and understanding why is the fastest way to see what the device is.

For the first half of the book you have two accounts: Nick, in the present tense, from the morning his wife vanishes, and Amy, in diary entries about their marriage. Then Part Two opens and the diary is revealed as a fabrication, written to frame him. That is a brilliant piece of plotting. But notice what kind of unreliability it is: the diary is a forged document inside the story, planted by a character for the police to find. It is not a consciousness with a blind spot. Amy, once she speaks in her own voice, is entirely reliable about what she has done; Nick, it turns out, was lying far less than you assumed. After the reveal there is no gap left between the narrators and the book’s norms, and the remaining two hundred pages are a straightforward, very good thriller in which two people tell you the truth about each other.

That is the difference between a reveal and a texture in one book. The reveal is the point of Gone Girl; once spent, it is spent. The texture is the point of Remains of the Day, and it cannot be spent, which is why the second reading is better than the first. Neither is the wrong thing to want. But if you came to this page from Gone Girl, it is worth knowing that most of the other books here are not going to do that to you, and are doing something else.

The counterweight

  1. Gone Girl Gillian Flynn

    2012 · 432 pages · Nick and Amy Dunne, alternating first person

    The counterweight The forged diary

    Nick Dunne comes home on his fifth wedding anniversary to find the door open and his wife gone. His chapters alternate with Amy’s diary, which tells the story of their marriage from the meeting onwards, and the two accounts are steadily, deliberately incompatible. Flynn is very good at the small mechanics of suspicion: the things Nick does not say, the things Amy says slightly too well. The halfway turn is famous for a reason, and the “Cool Girl” passage that follows it has been quoted more than any other page of the book.

    It is here as the counterweight because the unreliability is a planted object, not a mind, and because once the turn arrives everything is confirmed and the device is finished. If that is what you want, it is done superbly, and the film (Fincher, 2014, Flynn’s screenplay) is a rare adaptation that loses nothing. If what you want is the feeling of not being able to trust the voice in your ear, it is the wrong book, and the right ones are above.

    How it ends
    Amy comes back, on terms, and the last chapter is Nick working out what staying will cost.
    Contains
    Violence; Coercive control; A fabricated rape accusation used as plot
    Skip if
    You want unreliability that survives the reveal; this one is built to be spent.

    Checked against: Wikipedia: structure, sales, film, Secrets of Story: the unreliable-narrator fake-out, Hollywood Reporter: Flynn on the book’s legacy

“You can always count on a murderer for a fancy prose style.”

Vladimir Nabokov, Lolita, Part One, ch. 1

The one-line theory of the whole device. The narrator is warning you, on the first page, that the prose is going to be used against you, and he is proud of it.

Where this page’s facts come from

FAQ

More on this list

Is Holden Caulfield in The Catcher in the Rye an unreliable narrator?

By the popular definition, yes: he is sixteen, angry and a poor judge of people, and readers are meant to see round him. By Booth’s definition it is a borderline case, because Holden does not misreport events; his facts are sound and only his verdicts are off. He is the most-taught example and the least typical one, which is why this page uses him as the boundary rather than a pick.

Which of these is the shortest?

The Yellow Wallpaper, at around six thousand words, is an hour and is free online. Among the novels, The Sense of an Ending (163 pages) and Audition (208) are each an evening. Gone Girl at 432 pages is the longest.

Is it safe to read the Wikipedia page for The Murder of Roger Ackroyd before I read it?

No. The solution is in the plot summary and often in the opening paragraph. The same is true for Gone Girl and, more mildly, The Sense of an Ending. The safe ones to research first are Remains of the Day, Lolita, The Yellow Wallpaper, Elizabeth Is Missing and Room, all of which tell you what is wrong with the narrator on the first page.

Can a third-person narrator be unreliable?

Strictly, unreliability belongs to a narrating voice, and a third-person narrator usually has none of its own. What third-person fiction does instead is filter events through one character’s limited understanding: Henry James’s What Maisie Knew (1897) sees an adult divorce through a small child and is the classic case. Critics call this focalisation rather than unreliable narration, but the reading experience is close to Room.

Where do dementia and memory-loss narrators fit?

They are the “cannot hold the facts” kind: honest, and structurally unable to keep information the reader keeps. Elizabeth Is Missing is the best entry point. This site has a separate page on dementia in fiction, and another on memory loss more broadly, which sort by how the forgetting works.

Fiction about dementia, sorted by who is narrating