I enjoyed this book quite a bit. Cat is a high school scientist and kind of all around geek. She also has a bit of a weight problem. So for a special science fair project, she's going to try to live like a hominin. The result is a better body and a happier life.I was kind of sad the be finished with this book. I liked the characters a lot (although, to be honest, Cat was kind of stubborn and annoying when it came to Matt). I only gave the book three stars because it seemed like the author was really trying to push vegetarianism and it seemed heavy-handed to me. That is just my opinion, though.This book has a little more substance than just a fun, light read and I would recommend people give it a try.