The first 3 books in a collection
The Twins at St. Clare’s:
In book one, the twins are simply not having it. St Clare’s is beneath them and they’re determined to cause a stir. But 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. Expect mischief at St Clare’s!
The O’Sullivan Twins:
Pat and Isabel are determined to work hard this term. But it’s just so tempting to play a few tricks on Mam’zelle…
Summer Term at St. Clare’s:
New girl Carlotta has a secret past! What will happen when sneaky Prudence tells the rest of the class? Watch out! There’s trouble at St Clare’s!
ISBN-10: 9781405257701 
ISBN-13: 978-1405257701