Mystery of the Secret Marks

Something odd is afoot at the exclusive Fox Ridge School for Girls in Maryland--and it seems directed at Darcy's timid roommate, Ro. Ro's horse is let out of his stall; at dinner, dozens of strawberries fly through the air, most of them pelting Ro; and a cryptic cypher appears on Ro's mirror and in her diary. The Monster Hunters are facing their toughest case yet!