Excerpt from his biography at marxists.org, where you can find some of his writings translated into English:
Ghassan Fayiz Kanafani was a Palestinian writer and a leading member of the Popular Front for the Liberation of Palestine.
Kanafani was born on April 9, 1936, in city of Acre (Akka). During the 1948 Arab-Israeli War, Kanafani and his family were forced into exile in neighbouring Lebanon, but soon moved on to Damascus, Syria, to live there as Palestinian refugees. He enrolled at Department of Arabic Literature at the University of Damascus, but before he could complete his degree, he was expelled and exiled to Kuwait for his political activities with the Movement of Arab Nationalists.
When, in 1967, George Habash led the dissolution of the MAN and the formation of the PFLP, Kanafani joined and became one of its spokesmen. In 1969, he drafted a PFLP program in which the movement officially took up Marxism-Leninism. He was assassinated on July 9, 1972, in Beirut by car bomb planted by the Mossad.