China National Aviation Corporation
During his career, Leary authored books on various books on the history of aviation, including different airlines and the commercial airline industry. He documented the history of the China National Aviation Corporation, Civil Air Transport, and Air America, and their links to the United States Intelligence Community, in a trilogy of books: "The Dragon's Wings: the Story of the China National Aviation Corporation", "Perilous Missions: Civil Air Transport and CIA Covert Operations in Asia, a history of Civil Air Transport", and a third unfinished, unpublished book about Air America. Other books written by Leary discussed Mohawk Airlines, Project COLDFEET, and Allen Dulles. Other subjects covered in his writings included the Airmails of the United States, Bernt Balchen and polar aviation, the USAF's Combat Cargo Command, and the aerial resupply of Yugoslav Partisans during World War II.