The Sea City High School varsity cheerleaders head to ""The Wondrous Harvey-Carlson Circus"" for an afternoon of fun. But when a series of strange accidents threatens to put the circus out of business, it's up to the girls to step into their Pep Squad Mystery Club mode to stop the ""SABOTAGE UNDER THE BIG TOP."" Pep Squad Mysteries is a series of mystery chapter book adventures aimed at preteen readers and up.