Mark Cowan is a journalist with more than twenty years' experience in newspapers and television. He spent twelve years on the police beat charting the war on crime, and was also embedded with the British Army in war-torn Kosovo. Cowan has also worked on crime documentaries for the BBC and ITV. Martin Robson is one of the world's leading instructors on technical, cave and rebreather diving. A former Royal Marine Commando, he has been cave diving for more than twenty years, leading explorations and tours of systems in France, North America and Mexico. In 2003, he discovered a new passageway in the Durzon cave, France, more than a mile into the cave and one hundred metres underwater. Only a handful of people have ventured there since.
**'One of the best accounts ever written of deep-water diving and its staggering, haunting dangers' Robert Kurson, New York Times bestselling author of Shadow Divers{::}**