His research is meticulous, his characters are skilfully drawn and the narrative is so well paced and constructed that it develops a hypnotic, almost suffocating tension. But far more than adventure, this is also a haunting, painful story of obsession. The comparisons with THE PERFECT STORM are not out of place; this is a memorable story, beautifully told. - The Sunday TimesUndersea thrills, a gripping mystery, incredible discoveries.written with great you-are-there intensity and dynamic verve. A pulse-quickening real-life thriller. - New York Times[A] pulse-quickening account of the attempt to explore and identify the mystery sub . [a] fantastic yarn that happens to be true.

- NewsweekAn irresistible sea yarn.Sometimes writers, like divers, stumble on treasure. - TimeDescribes all the anguish, exhilaration and danger if deep-sea wreck diving in vivid detail.one of the best pieces of dive-related non-fiction I have read. - Sport DiverSuperlative . If the publishers are dreaming of another PERFECT STORM, they may get their wish. - Publishers WeeklyA tremendously suspenseful story of discovery that comes as close as any book could to providing the reader with approximate sensations of deep sea diving and of life on a submarine at war, and that leaves us with a hell of an impression of the grit, guts, and compassion of a U-boat crew and the two.