Mary Roach is just so wonderful to read. Her books make me giggle and call out trivia to B. Gulp: Adventures of the Alimentary Canal is no different. Yes, parts are gross. The gross bits are surrounded by amazing interesting bits and are interesting in themselves. If you're really likely to be grossed out, I can say most of the book is set in and above the stomach. Who knew mouths were so cool? I think i liked this better than her last one which was about the science of getting humans to live in space. Roach is really a brand now; if you liked something she wrote previously you'll like this one, and vice versa. a 6 from me.