What do you want me to bring you from the bookstore?

Triple venti half-sweet non-fat caramel macchiato

A novel about a girl on a train, a mystery.  Was advertised about 8 months ago.  Sounded interesting.  don't remember the name. 

Whatever you do, don't get the wrong book!

Psycho by Robert Bloch. I hear it's not so good, but I want to read it anyways.

I wanted a book about remembering stuff, but I forgot what it's called.