Julian, Dick, Anne, George and Timmy the dog find excitement and adventure wherever they go in Enid Blyton's most popular series. In book six, Uncle Quentin has locked himself away on Kirrin Island.

What's he up to and why won't he let anyone visit? Then the Famous Five discover that a suspicious stranger is watching Uncle Quentin's every move. Can the Famous Five warn Uncle Quentin in time?This 70th anniversary edition features the text from the Classic edition.

Its cover has been illustrated by Shirley Hughes, but there are no inside illustrations.

All anniversary editions, each illustrated by a different artist, benefit the House of Illustration, the world's first dedicated home for the art of illustration (houseofillustration.org.uk).