Worms are small and gross, but they're also one of the world's most important critters. Readers will enter the world of wiggly worms and learn about worms' appearance, habitat, behavior, and essential role in nature's ecosystems. The science-heavy narrative supports elementary science standards, while highly detailed, full-color photographs capture and hold interest. Worms will rise above their reputation as wiggly dirt creatures; they're essential for a healthy environment.