Scooby-Doo and the Mystery Inc. gang are excited when they're invited to be guest judges at an annual costume contest in Salem Massachusetts. But when the party is crashed by two terrifying witches chaos unfolds among the trick-or-treaters. The Gang begins to investigate and quickly discovers there is more than one spooky suspect in Salem. To solve the You Choose mystery readers decide which path to follow uncovering twists and turns along the way. A glossary and Scooby-Doo jokes make this a fun and educational read.