2013, Tundra Books
The Good: I really liked this book. It was fun and super informative. I didn't even realize it was for kids until I noticed it kept using school situations as examples and mentioned poop a lot more than the average adult book. The pictures were great as well and I would recommend this for most age groups, including adults. Gross and educational - the perfect mix.
The Bad: A little too dry in places to really hold a kids attention, but written for that audience causing adults to feel out of place with the school age references.