In this action-packed adventure book Cussler relates the recent activities of NUMA, the organisation that features in his thriller novels and which he also created in real life: the National Underwater and Marine Agency. Cussler takes his fiction into the sphere of fact in a series of daring and audacious dives, seeking to reclaim wrecks lost beneath the surface of sea, lakes and swamps. Each of the sections of this underwater adventure book contains both an exciting account of the loss of the wreck concerned and Cussler's attempt to bring it back to the surface. Here Cussler and Dirgo recount the discovery of a seventeenth-century man-of-war; Civil War Ironclads; the wreck of the Marie Celeste; and the Carpathia, the ship that rescued the survivors of the Titanic and JFK's PT 109. This book is sure to entrance Cussler's legions of devoted fans as well as the increasing number of people fascinated with extreme sports, notably deep-sea diving.