Task: Question Answering
Input (English): Context: The Four Lords of the Diamond is a series of four science fiction novels by author Jack L. Chalker. Each volume of the series primarily follows a duplicate of a government agent as he lands on his prison planet and begins to both investigate the menace to the civilized worlds and find his position in his new society. The duplicates realize the stagnancy and corruption of the Confederacy, the intergalactic government in the series, and question their position as tools of the hierarchy. As the series progresses, the primary agent experiences each of his counterparts' divergent experiences and begins to question his beliefs as well. Like much of Chalker's work, the series deals with the effects physical transformations have on a character's personality., The Washington Science Fiction Association (WSFA) is the oldest science fiction club in the Washington, D.C. area. It is also one of the oldest science fiction clubs, founded in 1947 by seven fans who met at that year's Worldcon in Philadelphia, the fifth Worldcon held., Charon : A Dragon at the Gate is the third book in the Four Lords of the Diamond series by author Jack L. Chalker . First published as a paperback in 1982 . It continues the saga started in Lilith : A Snake in the Grass and Cerberus : A Wolf in the Fold and is concluded by the fourth and last book called , Medusa : A Tiger by the Tail ., Jack Laurence Chalker (December 17, 1944  February 11, 2005) was an American science fiction author. Chalker was also a Baltimore City Schools history teacher in Maryland for 12 years, retiring during 1978 to write full-time. He also was a member of the Washington Science Fiction Association and was involved in the founding of the Baltimore Science Fiction Society., Subject: charon: a dragon at the gate, Relation: author, Options: (A) jack laurence chalker (B) one
Output (English): jack laurence chalker