This author wrote a book that was the basis of the film about high school social cliques.
Queen Bees and Wannabes: Queen Bees and Wannabes is a 2002 self-help book by Rosalind Wiseman. Queen Bees and Wannabes:  The book was, in large part, the basis for the film "Mean Girls" (2004). Mean Girls:  The movie is based in part on Rosalind Wiseman's non-fiction self-help book "Queen Bees and Wannabes", which describes female high school social cliques and the damaging effects they can have on girls.
Rosalind Wiseman