Gr 2–5—These comprehensive titles are expertly written. Readers are initially asked two true or false questions and are directed to find the answers in the book. Answers are given in the back. The font is large, and sentences are relatively short. Maps and lifecycle diagrams are included among the images. A "True Statistics" section at the end of every volume sums up interesting facts. For example, readers learn that the saltwater crocodile is the world's heaviest reptile, and that the Goliath frog is the largest frog. Threats to the animals' survival are mentioned in a section called "The Big Truth." For example, in Birds, students learn that oil spills are devastating to seabirds. The books are loaded with big, colorful, and captioned photographs. Sound choices for report writing and pleasure reading.