Backsides: Zoo Animals is a book of photographs showing the backs and fronts of animals often found in a zoo. The book is aimed at young children who will delight in figuring out a mystery. By looking first at an unusual view of an animal--it seems all books with animals show the front or side--in Backsides: Zoo Animals, a child has to work out what creature it is. Turning the page reveals whether the child has figured it out correctly.