School days at St. Clare's with the twins Pat and Isabel O'Sullivan are never boring in Enid Blyton's beloved boarding school series. In the fifth book, it's time for a new head girl. There are many candidates, but after a frightening accident and a funny school play, the true leaders are revealed. Expect more pranks at St. Clare's! Between 1941 and 1946, Enid Blyton wrote six novels set at St. Clare's. Books 5, 6, and 9 are authorized sequels to the series written by Pamela Cox and include plots set between Blyton's original novels. These books were published in 2000/2008 and are without illustrations.