Talk to your local librarian for more suggestions!

Children

• The Polar Express by Chris Van Allsburg
• A Bear Called Paddington by Michael Bond 
• The Railway Series by Rev. Wilbert Awdry and Christopher Awdry

Young Adult

• Murder on The Canadian by Eric Wilson, Flo Wilson (1976)

Adult Fiction and Memoir

• Murder on the Orient Express by Agatha Christie (1934) mystery
• The Great Train Robbery by Michael Crichton (1975) historical novel
• The Harry Potter Series by JK Rowling fantasy
• La Bete Humaine by Émile Zola (1890) thriller
• Stories of the Railway by VL Whitechurch (1912) short story, mystery
• The Great Railway Bazaar by Paul Theroux (1975) fiction
• Parallel LInes by Ian Marchant (2003) travel memoir
• Around the World In Eighty Days by Jules Verne (1872) adventure
• 4:50 from Paddington by Agatha Christie (1957) mystery, Miss Marple
• Strangers on a Train by Patricia Highsmith (1950) mystery, thriller
• Murder on the Ballarat Train by Kerry Greenwood (1991) mystery, Phryne Fisher
• Murder on the Flying Scotsman by Carola Dunn (1996) mystery, Daisy Dalrymple
• Raising Steam by Terry Pratchett (2013) Discworld, fantasy
• Water for Elephants by Sara Gruen (2006) fiction
• The Christmas Train by David Baldacci (2001) fiction
• The Mystery of the Blue Train by Agatha Christie (1928) mystery, Hercule Poirot
• Drood by Dan Simmons (2009) thriller, historical fiction
• Railway Confessions  – A Collection of Short Stories by Carolyn Moncel (2012)

History

The  Railway Station: A Social History  by Jeffrey Richards and John M. MacKenzie 

The Oxford Companion to British Railway History  Oxford Press

Union Pacific: Salt Lake Route by Mark Hemphill Boston Mills Press

Los Angeles and Salt Lake Railroad Company, The: Historic Union Pacific Salt Lake Route (Second Edition) by John Signor Golden West Books