Winter Term at Malory Towers

Welcome to Malory Towers, where there's more to life than lessons!
This term the fourth-formers are busy planning for the school Christmas concert, but that doesn't stop them plotting tricks too! Susan is supposed to be in charge of the play but bossy Sylvia wants to take over, and new teacher Miss Tallant seems surprisingly knowledgeable about all of their plans. Could there be a spy in their midst?
Between 1946 and 1951, Enid Blyton wrote six novels set at Malory Towers. Books 7-12 are authorised sequels of the series written by Pamela Cox in 2009 and focus on the adventures of Felicity Rivers, Susan Blake, and June Johns. This edition is unillustrated.