An excellent mystery by the successful author Enid Blyton, perfect for lovers of secret cases. The Trottevilles are hosting Eunice, and Fatty does everything to avoid her. Hidden from Eunice, his disguise leads him to a mystery: there is an escapee in Peterswood who is also a master of disguise. Now, Fatty, Larry, Daisy, Pip, and Bets must find the man while also avoiding Eunice. This edition contains the original text and is not illustrated.