The Sun Also Rises, by Ernest Hemingway
"Yes, Hemingway gets a bad rap sometimes, and sometimes he deserves it. And yes, on one level this actually is a book about a guy who got his dick shot off in World War I. But much more than that, it's a very funny, very moving inquiry into why, when men set out to have a good time, they so often end up feeling sad instead."
-Suggested by Lev Grossman, book critic for Time magazine and author of The Magicians trilogy, which is slated to be a SyFy television series in 2016.