Dick is woken by a light flashing through his window. Is someone trying to send him a coded message? When the Famous Five hear of an escaped convict in the area, they are on red alert.

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?

The Five find out about something dangerous out in Mystery Moor. They'll have to risk the treacherous mists and follow the trail if they want to find what's lurking in the shadows. Do they know what they've let themselves in for?

This 70th anniversary edition features the Classic editions of three Famous Five adventures (books 10-12) in one volume and contains the original cover art and inside drawings by Eileen Soper.