Book Enid Blyton. Secret Seven. Book 2. Adventures of the Secret Seven

Product description from producer

The Secret Seven are on vacation again! While playing with friends, Colin, sitting in a tree, noticed a very strange man climbing over the huge wall of the Milton estate. Who is he and why was he so scared when he saw the kids dressed as Indians? And who owns the strange round marks left near the wall? And after learning that a precious pearl necklace had disappeared from the estate, the members of the "Secret Seven" society decided not only to find answers to these questions, but also to catch the clever thief.