Samuel Eldred Greenlee, Jr. (July 13, 1930 – May 19, 2014) was an African-American writer, best known for his controversial novel The Spook Who Sat by the Door, which was first published in London by Allison & Busby in March 1969 (having been rejected by dozens of mainstream publishers), and went on to be chosen as The Sunday Times Book of the Year. The novel was subsequently made into the 1973 movie of the same name, directed by Ivan Dixon and co-produced and written by Greenlee, that is now considered a "cult classic".
Born in Chicago, Greenlee attended the University of Wisconsin (BS, political science, 1952) and the University of Chicago (1954-7). He was a member of Kappa Alpha Psi fraternity (Beta Omicron 1950). He served in the military (1952-4), earning the rank of first lieutenant, and subsequently worked for the United States Information Agency, serving in Iraq (in 1958 he was awarded the Meritorious Service Medal for bravery during the Baghdad revolution), Pakistan, Indonesia, and Greece between 1957 and 1965. Leaving the United States foreign service after eight years, he stayed on in Greece. He undertook further study (1963-4) at the University of Thessaloniki, and lived for three years on the island of Mykonos, where he began to write his first novel. That was eventually published in 1969 as The Spook Who Sat by the Door, the story of a black man who is recruited as a CIA agent and having mastered the skills of a spy then uses them to lead a black guerrilla movement in the US.