Hitchhiker's Guide To The Galaxy. Brilliant book, I have read it more times than I can count. Shoutout to /t/42!
You know Hitchhiker's Guide comes up all the time when asking about favorite books, but it is one I have just never gotten around to reading. At this point I think I'm just being stubborn and not reading it on purpose.
So ... grab a towel (and the book) and stop being stubborn!