D is for Deadly ... Dink, Josh, and Ruth Rose are having a sleepover-in a castle! Dink's favorite mystery writer, Wallis Wallace, has invited them for a visit. But as soon as they arrive, the kids start hearing screams behind the walls. Wallis Wallace says not to worry, every castle is haunted, but Dink isn't so sure. Can they discover who-or what-is haunting Moose Manor?