BOOK 1:

Cavern in the Hills 

For sixteen-year old Kelly Hobbs, there is nothing more important than to join her fellow Pep Squad Mystery Club members by becoming a Sea City High School Varsity Cheerleader. But before that can happen, Kelly, her sister Kristen and their cheerleader friends, Asia, Miranda, Dinah and Cynthia, must solve a series of semi hijackings and the secret of the CAVERN IN THE HILLS.