Several works, such as The Confidential Agent, The Quiet American, Our Man in Havana, The Human Factor, and his screenplay for The Third Man, also show Greene's avid interest in the workings and intrigues of international politics and espionage.
Nekoliko dela, kao što su Poverljivi agent, Mirni Amerikanac, Naš čovek u Havani, Ljudski faktor i scenario za Trećeg čoveka, takođe pokazuju Grinovo strastveno interesovanje za delatnost i intrige internacionalne politike i špijunaže.