John P. Marquand & John Betancourt 
Your Turn, Mr. Moto [EPUB ebook] 

Casey Lee, a former military pilot, has been offered a chance to fly a Japanese-built plane from Japan to the U.S. While in Tokyo, he encounters Mr. Moto and soon finds himself kidnapped and in China, mixed up in international espionage involving Japan, White Russian exiles, and the U.S.