Schooldays at St Clare's are never dull for twins Pat and Isabel O'Sullivan in Enid Blyton's much-loved boarding school series. The twins at St Clare's Pat and Isabel find life at St Clare's is not as easy as they thought. They have several surprises and arguments before they admit their troubles are of their own making, and settle down to make friends. The O'Sullivan Twins at St Clare's It's the start of the Easter Term and the twins are looking forward to meeting all their friends at St Clare's once more. They are determined to be obedient and studious, but the new girls prove to be so much fun. Poor Mam'zelle had better watch out. Summer Term at St Clare's The twins 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!