These books turn scatology into a guessing game. A different biome is spotlighted in each title, with various types of poo introduced along with clues to the identity of their makers. Labels point out details such as color and consistency, and three animals are suggested. After studying the text and photos, readers turn the page to see if their guess is correct. Additional facts are shared on the reveal page. For instance, hippos use their tails like propellers to spread their poo around their territory. The books end with a “Bonus Poo!” section, which describes more animals from the biome and their poo habits. VERDICT Perfect for students who enjoy bathroom humor and animal facts. This series will not stay on the shelf.