Lionel and Patricia Fanthorpe have investigated the world's unsolved mysteries for more than 30 years and are the authors of 15 bestselling books, including Mysteries and Secrets of the Templars and Mysteries and Secrets of the Masons. They live in Cardiff, Wales.

Castles are among the most mysterious buildings on earth. Their grimly silent stones are signposts to a past filled with high adventure, grim tragedies, and glorious victories. Ghosts, hauntings, and other paranormal phenomena are frequently reported from castles. Do strange paranormal powers lurk among their ancient ruins?

The World's Most Mysterious Castles takes you on a journey through hidden chambers and subterranean tunnels of castles all over the world. Their walls served the sinister needs of spies, traitors, and assassins. Do the spirits of attackers and defenders who died in long-forgotten sieges still linger where they fell? Screams of unbearable pain and despair were muffled within their deepest, darkest torture dungeons. Do they echo there still?