"The Seventh Stone" is an exciting book by the famous writer Nikolai Nosov, a story about adventures and secrets hidden behind an ordinary appearance. The main character, a young guy named Petya, accidentally finds the seventh stone in the quarry, which turns out to be magical. This stone gives Peta the ability to teleport to any location where it is near other stones. From this begin exciting adventures, journeys in time and space, incredible discoveries and revelations of secrets. "The Seventh Stone" is a book that will not only entertain you, but also leave you thinking long after reading about how unpredictable and amazing our lives can be.