Have you ever seen in movies where people read in the bath? I've tried it. It's not actually that great. Your fingers feel dried out while the rest of you is sloshing around (not too hard though, don't want to wrinkle those pages.)Don't sit the book down too close to the edge, lest your book attracts droplets.
I may or may not have ruined a book this way. Seriously, don't do it.