Julian, Dick, Anne, George and Timmy the dog find excitement and adventure wherever they go in Enid Blyton's most popular series.

In book eleven, the Famous Five are on an adventurous holiday in horse-drawn caravans. They discover a ruined castle that looks deserted. But is that a face at the window? Or is it a trick of the light?

Just who is hiding in the castle?

This 70th anniversary edition features the text from the Classic edition. Its cover has been illustrated by Steve Antony, 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).