After recovering an ominous red rock locked inside a strongbox, The Pep Squad Mystery Club is led into another dangerous case as they try to figure out what its strange secrets. With government agents and devious criminals closing in, can the cheerleader-detectives keep it out of the hands of evil spies and solve the RIDDLE OF THE RED ROCK? Pep Squad Mysteries is a series of individual mystery chapter book adventures aimed at young readers and up.