Coming in January, 2006.
Silent Steel : The Mysterious Death of the Nuclear Attack Sub USS Scorpion (Hardcover) by Stephen Johnson.
"Johnson painstakingly details the last 18 months of the Cold War–era fast-attack nuclear submarine U.S.S. Scorpion, which disappeared with all hands on May 22, 1968, in the mid-Atlantic.....Was it a Soviet attack? Did one of the Scorpion's torpedoes accidentally detonate? Did its hull crack due to poor maintenance? Did its main storage battery explode? Mining navy documents and first-person testimony, Johnson's deeply researched effort explores these and other possible explanations, but concludes that the ship's end will remain an enigma".
Link to Amazon.com page for Scorpion Book