These books focus on fascinating sea mammals and their habitats. Each title includes information about classification, habitats, adaptations, food chains/webs, behavior, and intelligence. They also include coverage of environmental issues such as climate change and other threats to habitats. Attractively illustrated with large, top-quality photographs and artworks. Fun, high-interest and thought-provoking nuggets run alongside the appropriate curriculum content of the main text, which will keep the reader interested and eager to read on. "This set will be a first purchase for most collections." ~ School Library Journal.