 He appears in Resnais' "Toute la mémoire du monde" (1956) and in Marker's "Immemory" CD-Rom; he wrote "China" (1956) for Marker's "Petite Planète" collection and traveled with Marker in the making of "Letter from Siberia" (1957), which inspired his book "Siberia — Zero + Infinity" the following year.According to his 1989 biographer, Dorothy Knowles, Gatti was born in 1924 in a shantytown in Monaco to Auguste Rainier an Italian anarchist from Piedmont, who escaped murder in a Chicago slaughterhouse because of his political activities and fled Benito Mussolini's regime and to Letizia Lusona a maid.During World War II, Gatti joined a small French resistance maquis.