Shadow Divers is a journalist style work describing the discovery of a mystery shipwreck in the Atlantic, 60 miles off the coast of New Jersey. Turns out the ship is a previously undiscovered WWII era German submarine. The story is the chronological description of how a group of adventure divers penetrate the wreck. The book is about the dangerous, even deadly, sport of deep level diving; but also contains interesting descriptions of the original research that was needed to identify the wreck. Eventually the divers find not only the true identity of the U-Boat, but also plumb the depths of their inner selves as well. Those interested in history, WWII, underwater adventure, and the intricacies of human interactions will find this book fascinating.