Wrong train. You're thinking Murder on the Orient Express (yes, Agatha Christie). "Strangers on the Train" has to do with murder, but more with the psychology of murder. Depends on your taste in literature. Patricia Highsmith is less a mystery writer than a suspense writer. She wrote a classic "how to" book on the subject...not terribly thick but full of good information, if you think (as I do) that every story should have a thread of suspense running through it. Bradbury and Heinlein couldn't be more different in styles (to me). I liked "I, Robot" by Asimov...not technical, about the inhumanity of humanity. Beautifully thought out stuff....real and heart breaking. Well, it was to me at the time. I liked some of Harlan Ellison too but he's a mean cuss sometimes. Dashiell Hammett? Maybe he seems more my style. And he was, once.