Enid Blyton's Secret Seven book series features a group of children who form a secret society to solve mysteries and right wrongs. The group consists of seven members - Peter, Janet, Jack, Barbara, Pam, Colin, and George - who gather in their secret clubhouse to discuss and solve mysteries. The series is known for its exciting and intriguing plotlines, relatable characters, and suspenseful storytelling. Each book in the series features a new mystery for the Secret Seven to solve, often involving theft, kidnapping, or other crimes. The group uses their intelligence, bravery, and teamwork to crack the case and bring the culprit to justice. The Secret Seven books have been praised for their ability to captivate young readers and inspire them to use their own problem-solving skills.