Secret Seven 03: Well Done, Secret Seven 七个小神探3：不速之客 ISBN9780340917565

　　The Secret Seven have a new meeting place - a treehouse! But someone else is using it too. The gang are furious, but then they learn the intruder is in big trouble and needs their help. Can the Seven come to the rescue...?

　　Enid Blyton died in 1968 but remains one of the best-known and best-loved writers of children's stories. She is consistently voted a children's favourite in author polls. She has over 600 children's books to her credit, including the Famous Five series, the Secret Seven series, the Naughtiest Girl series (all Hodder) and the Malory Towers and St Clare's series (both available from Hodder on audio).