Three novels · One line

The Train Between Worlds

by Simran Mehta

Every door aboard costs the same thing to open: one true memory of the person you’d go back for.

Read the series Meet the three books

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Board

Nobody knows how they get on the train.

They wake in a carriage with no destination board and no memory of boarding. They stay, because leaving is expensive: every door aboard costs one true memory of the person you’d go back for. Not a fact. Not a date. The kind you can walk around inside.

You will not feel it go. You will never know which one you paid.

Three novels ride the same line — a man with no past, a mother hunting her daughter, and a woman who has been mapping the carriages since 1981. Each one stands completely alone.

Cover of The Train Between Worlds by Simran Mehta: two figures walking down a dim railway carriage as the walls dissolve into starlight.

Book One

The Train Between Worlds

Lost on an endless train where realities blur, memories surface, and every choice reveals who you truly are.

You wake on a train with no name, no past, and a ticket that reads Destination: Unknown.

One moment the windows show quiet countryside. The next, impossible dreamscapes where logic twists and reality comes apart. Every door opens on another mystery. Every passenger is keeping something back. And the train itself feels alive.

Then there is Lumi — appearing and vanishing like smoke, speaking in riddles, somehow knowing the path you forgot you were on.

Where the line begins — a complete story in itself

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Cover of The Memory Fare by Simran Mehta: a lit sleeper train streaking across a deep teal field, a lone figure standing beneath it.

Book Two

The Memory Fare

A novel of a mother, a missing daughter, and the train that charges in memories.

Six years after her daughter vanished, Cora Marsh finds her handwriting on a luggage tag.

The train it came from doesn't appear on any schedule, and the fare isn't paid in money. Cora boards the 11:47 on purpose — nobody has ever done that before. Every door she opens costs one true memory of June. She will not feel it go.

She has more than she thinks. And fewer than she needs.

A standalone novel — no need to have read Book One

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

Book Three

The Forty-Year Passenger

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

For fifteen years, Abel Quist walked past a woman carrying an empty bucket. He never once looked at her face.

Abel has mapped the train for fifteen years. Then he finds a surveyor's mark dated 1981 — and learns that Verity Sloane has been mapping it for forty-five, in forty-three notebooks recording four hundred and eleven people she chose to spend.

One of the entries is his brother.

A standalone novel — new readers can start here

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Reading order

Start anywhere on the line

The three novels share a world, a currency, and a train — but not a plot. Each is written to be a complete first book. Pick the one whose question you cannot put down.

If you want

The strangest ride

Start with The Train Between Worlds — surreal, shifting, and closest to a waking dream.

If you want

To have your heart broken

Start with The Memory Fare — a mother, a missing daughter, and an unbearable arithmetic.

If you want

An argument you can’t settle

Start with The Forty-Year Passenger — three people, three answers, and only one of them right.

For readers of

Reading guides

Not sure this is your kind of book?

These guides answer the question first and recommend the series second — including plenty of books that aren’t ours.

Read-alike guide

Books like Piranesi

Seven novels about vast, impossible places and the patient people who map them.

 Read-alike guide

Books like The Midnight Library

Two different shelves hide inside this question. Find out which one you actually want.

 Read-alike guide

Books like Before the Coffee Gets Cold

Gentle, rule-bound, quietly devastating — the shelf that Kawaguchi's café belongs to.

 Theme guide

The best liminal space books

Corridors, waiting rooms and transit that never arrives — fiction about places built for passing through.

 Setting guide

The best books set on a train

Locked-room mysteries, railway travel writing, and the rare novels where the train is the whole world.

 Theme guide

Fiction books about dementia

Novels that render the illness from the inside, from the caregiver's side, or as something else entirely.

See all reading guides

The Author

Simran Mehta

Simran Mehta writes quiet, speculative literary fiction — stories about memory, loss, and the people we stop seeing. The Train Between Worlds is their first series.

All three novels are available on Kindle and free to borrow with Kindle Unlimited.

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FAQ

Questions readers ask

Do you have to read The Train Between Worlds books in order?

No. All three novels share a world, a currency and a train, but not a plot. Each one is written to work as a complete first book, and none of them spoils the others. Reading in publication order gives you the world in the order it was invented; starting anywhere else costs you nothing.

Learn more: how to pick your starting book

What is The Train Between Worlds actually about?

A train nobody remembers boarding, with more carriages than anyone has counted. Passengers stay because leaving is expensive: every door aboard costs one true memory of the person you would go back for. Not a fact or a date — the kind of memory you can walk around inside. The series follows three people paying that fare for very different reasons.

Learn more about Book One

Is The Train Between Worlds free on Kindle Unlimited?

Yes. All three novels are free to borrow with a Kindle Unlimited subscription, and each can also be bought outright on Kindle. The Memory Fare and The Forty-Year Passenger are available in paperback too.

Learn more on the Amazon series page

What should I read after The Midnight Library?

It depends which part of it you loved. If it was the premise — a place outside life where you get to examine your choices — you want speculative fiction with a clean central rule. If it was the feeling, you want quiet, consoling novels about second chances. Those are two different shelves, and the read-alike lists usually confuse them.

Learn more: books like The Midnight Library

What are liminal space books?

Fiction set in places built for passing through and then never left — corridors, waiting rooms, stairwells, transit that never arrives. The defining feature is not horror but suspension: the architecture is doing something the characters cannot explain, and the rules of the place matter more than the plot.

Learn more: the best liminal space books

Are there novels set entirely on a train?

A few. Most “train books” are murder mysteries that use a carriage as a locked room for a few hundred pages, or travel memoirs about real railways. Novels where the train is the whole world — no destination, no getting off — are much rarer, and they behave very differently.

Learn more: the best books set on a train

What is the best novel about dementia?

There is no single answer, because readers come to these books for opposite reasons — some want the illness rendered accurately from the inside, some want the caregiver's side, and some want a story that is about forgetting without being a medical narrative at all. The right book depends on which of those you need.

Learn more: fiction books about dementia

Which book is about a mother searching for her missing daughter?

The Memory Fare, Book Two. Cora Marsh has spent six years at a railway lost property office looking for anything of her daughter's. When she finally boards the train on purpose, she learns that every door she opens to search for June costs her one real memory of her — and she will never know which one she paid.

Learn more about The Memory Fare