The vast expanse, unknown depths, dangers and mysteries of the sea have led mariners to create fantastical stories of ghosts and monsters for centuries; it is a world strange and ‘other’ to the experience of land dwellers. This body of lore has served to bond nautical communities together around the world and throughout history, with international stories fusing with local tales. The Perilous Deep explores why these stories were told, how they were repeated and mutated and what fears, anxieties and desires they helped to express. This is a fascinating exploration of the supernatural history of the Atlantic Ocean and some of its neighbouring seas, showing how seafaring peoples have developed knowledge and a sense of control over nature through myths and legends.