Kenneth R. Sewell is a nuclear engineer and a U.S. Navy veteran who spent five years aboard the USS Parche, a fast attack submarine that was the Navy's most decorated ship. "Parche" conducted a number of special operations, some of which were revealed in "Blind Man's Bluff." Since leaving the Navy, Mr. Sewell has held both Department of Defense and Department of Energy security clearances. In researching "Red Star Rogue, " Mr. Sewell had access to recently declassified intelligence files in the U.S. and Soviet military archives that were opened after 1991, among other sources. A "New York Time...