I’m a fan of bathtub reading, albeit with certain rules. The book has to be something lighthearted and not too serious. It can’t be so big that it can’t be comfortably held in one hand, which rules out Brandon Sanderson, George R. R. Martin, and any other large tomes you might have lying about. It also has to be something that isn’t irreplaceable in case of an accident, which for me generally means nothing that’s signed, out of print, or hasn’t been released yet. Oh, and positively no e-readers! That’s just asking for trouble, even if you did put it in a watertight ziplock bag.
What about you? Do you read in the bathtub? What are your preferred bathtub-reading books?