A brilliant mystery series from bestselling author Enid Blyton, perfect for fans of The Secret Seven. Mr Goon is busy with a mystery all to himself until Fatty, Pip, Larry, Daisy and Bets discover his secret. There is a gang of jewel thieves using Peterswood as their headquarters! Soon the Find-Outers and Buster the dog are helping the police hunt down the thieves - but who are they? First published in 1947, this edition contains the original text and is unillustrated.