Book excerpt: Focusing on bones and joints, blood and the heart, lungs and breathing, the digestive system, brain, nerves, senses, and the life cycle, DK's Pocket Genius: Human Body is a head-to-toe look at our body and how it works. With images and content appropriate for young readers, Pocket Genius: Human Body looks at this amazing machine from the outer skin to the tiniest cells and tackles tough questions like, "What are reflexes?", "Why do we need food?", and "How does the heart beat?" Catalog entries include facts provided at-a-glance information, while locator icons offer immediately recognizable references to aid navigation and understanding, and fact files round off the book with fun facts such as record breakers and timelines. mini-encyclopedia is filled with facts on subjects ranging from animals to history, cars to dogs, and Earth to space and combines a child-friendly layout with engaging photography and bite-size chunks of text that will encourage and inform even the most reluctant readers.