A mysterious light flashing from an old tower on the Cornish rocks signals danger in this twelfth Famous Five adventure. Julian, Dick, Anne, George and Timmy the dog must uncover the truth behind the suspicious signals, but solving this mystery puts them directly in harm's way. Enid Blyton's beloved series captures the thrills of youthful detective work on a treacherous coastline. This edition features sensitively edited text for contemporary readers.