I am 8 years old and I am in 2nd grade (my mom is typing this for me). I think this book is a very funny and interesting book. Yet I havn't yet figured out my favorite chapter, I still do like this book a lot.
If you want to buy this and you are over 13, it does have a warning that you should put it down because it has robo butts, butt guns, butts that come off of people, and great white butts. People might not get it very well, unless you're familiar with the other Butt Books written by Andy Griffiths.
It is very fun to read when you are 8 years old. It makes me laugh a lot when I read this book. I like it and I think you should buy it too.