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 three, Pat and Isabel look forward to their first summer term at St Clare's.

They soon make friends with new girl Carlotta, who has a secret past that she's desperate to hide.

But sneaky Prudence finds out and tells everybody. How will the class react?There'll be mischief at St Clare's!Between 1941 and 1946, Enid Blyton wrote six novels set at St Clare's.

This edition features the original text and is unillustrated.