The Sea Hunters II is a sequel to the author's The Sea Hunters, also written with Craig Dirgo. Cussler is one of the world's foremost maritime diving experts and has formed a charitable institution, NUMA, the National Underwater and Marine Agency which searches for lost ships of historic significance. NUMA is also the name of the government agency in the author's Dirk Pitt adventure books. In this book Cussler relates NUMA's recent activities and takes his fiction into the sphere of fact and in a series of daring and audacious dives seeks to reclaim wrecks lost beneath the surface of sea, lakes and swamps. Each of the sections of this 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, 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.