Fascinating book! From what we eat to where it goes and all the details in between (and I do mean all the details), the alimentary canal is fascinating. Did you know beef lung has more vitamin C than a tangerine? Or what really killed Elvis? And I learned more than I ever expected to know about methods for smuggling items into prisons. I got the Audible edition and it's very well read with an extremely charismatic narrator. Highly recommended unless you're extremely squeamish about, well, the messy details of life.