Help Velma and the Hex Girls solve a riverboat ghost mystery in this officially licensed picture book featuring Scooby-Doo, Shaggy, Daphne, and Fred.

The Mystery Inc. gang has no idea that their class trip will include a visit from the ghostly Captain Barnacle. And when Shaggy, Scooby-Doo, Daphne, and Fred all become seasick, it's up to Velma to try to track down the passengers' stolen backpacks and the Hex Girls' musical gear! Could the mysterious dust on tarps and the deck floor be a clue? Join Velma and the Hex Girls as they work together to solve another spooky case in this all-new, all-hands-on-deck Mystery Inc. Picture Book mystery.

Robb Pearlman is a #1 New York Times bestselling author of many books, including The Office: A Day a Dunder Mifflin Elementary, I Love Lucy: Let's Put on a Show!, and Bob Ross and Peapod the Squirrel. He lives in New Jersey.Pedro Riquelme was born and raised in Malaga, Spain, where he studied Fine Arts and still lives with his family.