bx-zone.com says :-
Peter, Janet, Jack, Pam, Barbara, Colin, and George are 7 characters of the Secret Seven Novel series authored by Enid Blyton. They become famous for solving many mysteries in all the secret seven book series. All of them are teenagers and the storyline of the novels of the secret seven revolve around light adolescent mysteries. If you want to introduce your kids to bravery, fearlessness, teamwork and give them a cool time reading child mysteries then the secret seven books are the ones you should look forward to. Also, when you’re starting to read, or are really passionate towards building a reading hobby then ‘secret seven by Enid Blyton’ is the book you can get your hands on and why not buy it from the used books store when it is available at a discount of 38%.