Schooldays at St Clare's are never dull for twins Pat and Isabel O'Sullivan in Enid Blyton's much-loved boarding school series.
In book nine the unimaginable has happened - the twins made head girl! It's a tough job - cheeky first formers and cruel Priscilla keep the girls on their toes.
It's the twins last year and there definitely will be mischief!
(P) 2017 Hodder Children's Books