This book is suitable for ages 6 to 12 years. Every day, up to 100 species of animals become extinct, and each year this number grows. The focus of these series is to help children to gain an appreciation of each animal's important role on Earth. Set includes: "Endangered Bats"; "Endangered Bears"; "Endangered Butterflies"; "Endangered Chimpanzees"; "Endangered Elephants"; "Endangered Frogs"; "Endangered Komodo Dragons"; "Endangered Leopards"; "Endangered Manatees"; "Endangered Monk Seals"; "Endangered Monkeys"; "Endangered Mountain Gorillas"; "Endangered Pandas"; "Endangered Penguins"; "Endangered Rhinoceros"; "Endangered Sea Turtles"; "Endangered Tigers"; "Endangered Wolves"; and, "Endangered Zebras".