Guillaume Musso (French pronunciation: ; born 6 June 1974) is a French novelist.
Musso was born in 1974 in Antibes (Alpes-Maritimes), France. After finishing high school, he left for the United States at the age of 19. He spent several months in New York City, living with other young foreigners and earning money by selling ice-cream. Then he came back to France, earned a degree in economics, and taught in high schools. His first published novel, Skidamarink, a thriller that opens with the theft of the Mona Lisa from the Musée du Louvre, was published in 2001.
After a car accident he became interested in near-death experiences and imagined a story about a man who returns to life after touching death. This became the novel Afterwards... published in 2004 by XO Editions, which sold more than 1 million copies in France and has been translated into 23 languages. Afterwards, the film directed by Gilles Bourdos starring John Malkovich and Evangeline Lilly was released in France in January 2009 and then internationally.