“The Five Find-Outers” is a series of 15 books by the English writer Enid Blyton. Books in this series were published from 1943 to 1961. Five children spend their holidays in a small town called Peterswood. Every time they arrive, a crime occurs in Peterswood, which the young detectives investigate, certainly ahead of the city constable Mr. Goon.

The Mystery of the Ruined Castle A story about the travels of friends during the school holidays. The Fab Five - Julian, Anne, Dick, George and their faithful friend and assistant, the brave dog Timmy - go on a journey and find themselves in the thick of the most incredible events. The story was also published under the titles “The Mystery of the Fire Eater”; “Prisoner of the Ancient Castle.”

The Mystery of the Old Dungeon Summer has finally arrived, which means that the Fab Five are together again! And not only that, the children’s cherished dream will come true: to live on a wonderful, completely uninhabited small island, like real Robinsons. How cool it is here: the sea, the rocks, the old ship... But what is it? Where did the brand new suitcase come from among the ruins of the old ship? And on the ground you can see traces of a fire, and for some reason the dog growls, as if it sensed a stranger. “Have we really ended up in a den of smugglers?!” - the friends think with bated breath, and this is where a desperate cry is heard... The story was also published under the titles “The Fab Five Run Away”, “The Mystery of the Old Ship”, “The Mystery of the Black Suitcase” ", "Return to Treasure Island."