Poop: A Natural History of the Unmentionable is a children's book about (animal) feces, written by Nicola Davies and illustrated by Neal Layton.

The book gives info about the nature, production, variety, and manifold uses of animal poop.

The book analyzes styles, sizes, uses, and smells of animal poop.

A Kirkus Reviews review says, "Though Layton's crudely drawn cartoon illustrations provide more jocular side commentary than actual information, this breezy introduction will give young readers with a certain tolerance for (or attraction to) the yuckier side of natural history the scoop on poop—at least in the animal kingdom.

"[2] Blair Christolon, of School Library Journal, commented, "For nonfiction readers who have difficulty finding something of interest to read, this book is sure to catch their attention.