In The Fifth At Malory Towers by Enid Blyton

In the Fifth at Malory Towers sees Darrell Rivers begin her fifth year at Malory Towers, now one of the senior girls with more responsibility than ever before. Alongside lessons, sports, and midnight feasts, the girls must deal with a difficult new student whose behaviour causes tension around the school. Friendships are tested as Darrell and her friends learn important lessons about kindness, patience, and leadership.