Soon after a junior officer at submarine communication sold secrets to the Soviets enabling them to decipher coded American submarine communications, a Soviet missile sub on a mission near Hawaii sank with all hands in February 1968. Two weeks later, a spy reported that a damaged U.S. submarine had arrived in Japan. Soviet files reveal and interviews confirm that high Soviet officials believed it had deliberately sunk their vessel. In revenge, they torpedoed the Scorpion on May 27, killing ninety-nine men. This engrossing overview of American and Soviet submarine operations includes capsule biographies of the Scorpion's captain and many of its crew and families.