The Sixth Form at St Clare’s is the final book in the beloved St Clare’s series, originally created by Enid Blyton and later continued by Pamela Cox. This installment follows Pat and Isabel O’Sullivan in their last year at the boarding school, where they take on the roles of Head Girls. The book blends traditional school story elements with themes of leadership, maturity, and friendship. It introduces new characters and challenges while maintaining the familiar tone and setting that fans of the series appreciate. With a focus on responsibility, personal growth, and the bittersweet experience of moving on, the story offers a fitting conclusion to the twins' journey. Designed for readers aged 9–12, the novel captures the spirit of classic boarding school life, emphasizing teamwork, empathy, and resilience.

Written by Pamela Cox as a continuation of Enid Blyton’s original series, The Sixth Form at St Clare’s follows twins Pat and Isabel O’Sullivan in their final year at the boarding school. Now promoted to Head Girls, the twins are excited but quickly realize that leadership brings new responsibilities and challenges. They must manage younger students, including a pair of mischievous first-form twins, and deal with a sullen new girl named Morag, who refuses to engage with school life and prefers spending time at the nearby stables. Tensions rise with the arrival of a bullying sixth-former, Priscilla, and a mysterious situation involving secrets and blackmail begins to unfold. As the year progresses, Pat and Isabel work to support Morag, bring calm to the dormitories, and set a positive example. The story explores friendship, leadership, and the emotional difficulty of saying goodbye as the twins prepare to leave St Clare’s. The book ends on a warm and reflective note, bringing a satisfying close to the much-loved series.