This Charming Man by Marian Keyes. All of Marian's books are recommended- funny, great characters that could be someone you know. This one is my favorite of the bunch.
UK hardback cover
50 books you need to add to your bucket list
The Reader: Amazon.co.uk: Prof Bernhard Schlink: 9780753823293: Books
The Secret Life of Luke Livingstone
The Reader on the 6.27 is my translation from another language. Did enjoy it, very short and interesting. However, there wasn't enough reading on the train, and could actually have been a bit longer.