One night, after awakening from a terrible dream, a young boy heads out on his bike. The boy does not know where he is going, but he feels pushed in one direction. Soon he arrives at a mysterious cave, which he feels an urge to explore. Inside, a giant, deadly worm has trapped the Librarian! Now the boy is in danger as well.

Michael Dahl is the prolific author of the bestselling Goodnight, Baseball picture book and more than 200 other books for children and young adults. He has won the Association of Educational Publishers Distinguished Achievement Award three times for his nonfiction, a Teachers' Choice Award from Learning Magazine, and a Seal of Excellence from the Creative Child Awards. Dahl currently lives in Minnesota.