I'm reading a book that a friend let me borrow called "Riding Rockets" by Mike Mullane. It is really a great book. As an example, take a look at a preview of the first few pages. I was killing myself laughing at some of this stuff.
Working at Johnson Space Center, I get to see the spectrum of personalities within the astronaut corps, and this book really gives some great insight into Mike's psyche and what must be going through their minds. I haven't gotten too far in the book, but I really like it so far.