B-10, B-12, Export Type 139 / Type 166

A focused monograph on the Martin B-10 and B-12 bomber family, including the export Type 139 / Type 166 variants—aircraft that helped usher the U.S. Army Air Corps into the modern, all-metal era during the 1930s. The book explores the aircraft’s challenging development path, key design and equipment changes, operational service in U.S. hands, and its extensive export career, including wartime use by overseas operators.