R for Revenge (Sweet Valley High)

Was that a cheer ...  or a scream?

The Sweet Valley High cheerleaders have been kidnapped! Co-captains Jessica Wakefield and Heather Mallone thought they'd found the perfect faculty advisor for their cheer squad in Nancy Swanson.  But the cheerleaders don't know about the dark secret in Nancy's past.  Or how dangerous she really is.  Until Sweet Valley High's cheerleaders start disappearing ...  one by one.