Come for the freaky pictures, stay for the entertaining text. Boy, if I could give aspiring nonfiction writers one piece of advice, it would be - try to make a book that I can recommend to kids using that sentence. Although I guess it doesn't work for like, presidential biographies. Freaky pictures of presidents are rarely appropriate for kids.
Anyway. Michael Hearst, the author of Unusual Creatures: A Mostly Accurate Account of Some of Earth's Strangest Animals, seems to have figured that magic sentence out all by himself in this, his first nonfiction book for kids.