These simple but informative books in the Comparing Animal Differences series (12 titles) each cover two related (and frequently confused) animal species. After a brief introduction, each animal gets its own coverage in one chapter. A final chapter lled "What's the Difference?" mpares and contrasts the two species. In Toads and Frogs, York acknowledges both the usual characteristics of each amphibian and the overlap between the two. The back matter for each book adds photos of the two animals with call-out labels highlighting various body parts or features, a glossary, print and online sources for further learning, an activity (to draw the two animals, showing their differences), and an index. Appealingly simple, with one large, often full-page photo per spread, these books contain just enough information for young readers, and the pairings add a special twist.