Book excerpt: Join Scooby-Doo as he sets out to solve his greatest mystery yet--the secret to falling asleep! But catching some Zs isn't always as easy as solving mysteries. Can Scooby sniff out the creepy shadows, investigate the bumps in the night, and unmask the imaginary monsters haunting his bedtime routine? Find out in this delightfully spooky picture book by award-winning author Michael Dahl.