Worms--yuck! Most people find these slimy dirt-dwellers to be disgusting, but this volume teaches readers that worms do essential jobs. Readers learn about worm anatomy, habitats, and behaviors, as well as the ways they help soil decompose and all the benefits that come from the healthy soil they make. Information-rich text engages readers as fact boxes deepen their understanding of worms and their importance to people. Eye-catching photographs help readers visualize the world of worms and make for an unforgettable learning experience.