Thrillers:
* The Serpent: This novel, originally published in French as "Le Serpent" in 2006, was his debut novel and gained him significant recognition. It follows a French diplomat who becomes entangled in a dangerous conspiracy during the Cold War.
* The Traitor: This thriller was published in 2011 and focuses on a French intelligence agent who becomes the prime suspect in a murder investigation.
* The Spy: This novel, published in 2013, features a French spy who is sent on a dangerous mission to infiltrate a terrorist group in the Middle East.
* The Shadow: Published in 2016, this novel is a standalone thriller that follows a French investigator who is drawn into a complex case involving a missing girl and a mysterious cult.
Historical Fiction:
* The Night of the Generals: This novel, published in 2008, is a historical fiction novel set in Nazi Germany during World War II. It tells the story of a group of German generals who are suspected of plotting to assassinate Hitler.
* The Paris Conspiracy: This novel, published in 2010, is a historical thriller set in Paris during the French Revolution. It follows a young woman who becomes entangled in a dangerous plot to overthrow the monarchy.
Other Works:
* The French Connection: This novel is a non-fiction work about the history of the French intelligence services.
This list includes only some of his works, and he has written several other novels and short stories.
You can find more information about Guy Philippart de Foy and his works on his website or on websites like Goodreads and Amazon.