Gr 3-5-These titles open with an overview of the featured animal, end with a look at its relationship with humans, and cover such basic topics as its food sources, hunting habits, mobility, and natural predators in between. Seals differentiates between true and eared seal through skeletal diagrams and photographs; describes the various freshwater and saltwater species; and explains their varied diets, which range from krill and conger eels to penguins and crabs. Crocodiles distinguishes the varied snouts that identify alligators, caimans, and gharials; tells of the great care that a mother crocodile shows toward her young (in great contrast to the role of some mother seals); and illustrates crocodilian locomotion on land and in water. Both authors explain the direct and indirect role of humans in the lives of these creatures, from the harmful effect of polluted water to the beneficial changes in hunting laws, which have allowed these populations to increase. Striking, full-page photos and useful range maps, accompanied by clear, short sentences and easily found definitions, provide budding naturalists or young report writers with solid introductory resources.-Pam Spencer Holley, Young Adult Literature Specialist, Virginia Beach, VA Copyright 2003 Cahners Business Information.