Julian, Dick, Anne, George and Timmy the dog find excitement and adventure wherever they go in Enid Blyton's most popular series. In book seven, the Famous Five investigate spook trains in the dead of night.

The trains seem to vanish into thin air, but where do they go?

The Five discover an unusual underground tunnel system and a secret train-service. If they follow the tracks, will they solve the mystery?This 70th anniversary edition features the text from the Classic edition.

Its cover has been illustrated by David Tazzyman, 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).