If you've ever played outside, worked in a garden, or gone for a rainy walk you've probably seen a slimy brown worm! Earthworms look as if they have a smooth body. But do they? Worms' bodies are covered with tiny bristles called setae! Worms use setae to help them wiggle and burrow. In this interesting and informative book, young readers will learn all about the lowly worm! They'll uncover how worms' unique adaptations have evolved and why worms are important.