By: Mary Roach - Available at AmazonRoach is an intersting author. She finds scientists who do obscure research on her topic of interest, synthesizes their efforts into a pop research book. This time she tackles the digestive tract. I was pretty excited; however, she seemed to skip over the small intestine. I had heard about some of the experiments before; alas I didn't learn anything that changed my understanding of how it all works. Well except that HCl in your stomach isn't as acidic as I had assumed.