Let me just get to the bottom line, Chicken Cheeks is a funny book kids will enjoy; however, I'm not sure that parents will find it appropriate...although I'm okay with it. This comical book shares various names for the posterior end of various animals.
The storyline is about a bear who wants to get some honey, but he is not tall enough. So the bear gets some help from various animals. Animal are stacked on top of each other until they reach the honey.
The author is comedian Michael Ian Black and the Illustrator is Kevin Hawkes. Black's word choice is creative (i.e., duck-billed platypus gluteus maximus, polar bear derriere), and Hawkes illustrations humorous.
Recommendation: I say yes, butt not for everyone!