The "Pony Called Secret" series by Helen Tuffin is a heartwarming and adventurous collection of childrens books centred around the special bond between a girl and her pony, Secret. The series explores themes of friendship, responsibility, and the joys of equestrian life, making it a delightful read for young horse lovers. The main character of the series is a young girl named Holly who has a deep love for horses. Each book in the series revolves around Holly's adventures with Secret, often involving competitions, challenges, or mysterious occurrences related to the pony. The stories feature a mix of equestrian activities, such as riding, training, and competing in various events, while also introducing elements of mystery and discovery.The series is aimed primarily at children aged 7 to 12, particularly those who have an interest in horses and riding. It is well-suited for both independent reading and shared reading experiences with parents or caregivers.