Today marks the birthday of author and producer, Sam Greenlee. Sam Greenlee, a Chicago native who was an American writer of fiction and poetry and is best known for his novel The Spook Who Sat by the Door, first published in March 1969 in London by Allison & Busby (with Ghanaian-born Margaret Busby as its editor), having been rejected by dozens of mainstream publishers and received much critical attention, including extracts being printed in The Observer newspaper. The novel was subsequently made into the 1973 movie of the same name directed by Ivan Dixon and co-produced and written by Greenlee has become a classic in not only the Blaxploitation genre but in film as a whole.