The O'Sullivan Twins by Enid Blyton

Age : 7-11 

Its the start of the Easter Term and Pat and Isabel are looking forward to meeting all their friends at St Clares once more. The new girls prove to be a source of much amusement, and there is all the fun of boarding-school life as well. Paperback , 183 pages Published May 1996 by Mammoth (first published 1941)