Robert Matzen is an American author who specializes in Hollywood history. He spent 10 years with NASA and his avid interest in aviation-related topics resulted in the bestsellers Mission: Jimmy Stewart and the Fight for Europe and Fireball: Carole Lombard and the Mystery of Flight 3. He lives in Pittsburgh, Pennsylvania. Leonard Maltin is a film critic and historian who can be regularly seen on ReelzChannel and Turner Classic Movies. He is the author of the long-running Leonard Maltin's Movie Guide and its companion, Leonard Maltin's Classic Movie Guide. He lives in Los Angeles, California.