This is a story of some of the brave, brilliant & often barmy men that invented diving. It is a story of explosive tempers & exploding teeth, of how to juggle live hand grenades & steer a giant rubber octopus. A series of vivid portraits reveal the eccentric exploits of these pioneers. They include Guy who held a world altitude record when only sixteen, wrote a film for Humphrey Bogart, invented snorkelling & loved his wife enough to shoot her. Roy wore a backet over his head & stole a coral reef. Bill wearied of fishing with dynamite & wrestling deadly snakes, so he sealed himself in a metal coffin to dangle half a mile beneath the ocean. Cameron, testing the bouncing bomb for dam busters, made a plastic ear for a dog, a false testicle for a stallion & invented a mantrap disguised as a lavatory. He ascended from a depth of 200 feet without breathing equipment to see if his lungs would burst, then studied the effects of underwater explosions by standing closer & closer until shattered by the blast. The book also traces the evolution from spear fishermen to conversationalists, from treasure hunters to archaeologists, from photographers to philosophers. The sea is a secretive & seductive place & the author describes the magic & mystery of being beneath the waves.