St. Clare's Collection by Enid Blyton
This is a fantastic bumper volume of classic stories from a much-loved author. The O'Sullivan twins and their friends are back in this collection recounting their middle years at the famous boarding school. There are some new arrivals who cause a commotion, but as tricks are played and hidden talents revealed, the girls find a way to get along together - or most of them do! This volume collects books 4-6 in the series, Second Form at St. Clare's, Third Form at St. Clare's and Kitty at St. Clare's. Books 5 & 6 are by Pamela Cox.