The untold story of a covert submarine espionage operation against the Soviet Union during the Cold War, as experienced by the commanding officer of an active submarine. Few individuals outside the intelligence and submarine communities then knew anything about these top-secret missions, now known as the U.S. Navy's "silent service." Cloaking itself in virtual invisibility to avoid detection, the USS Blackfin went sub vs. sub, deep within Soviet-controlled waters north of the Arctic Circle, where the risks were extraordinarily high and anything could happen.--From publisher description.