"King of All" is a short alternate history story by Harry Turtledove. It was published in New Destinies VI, Baen 1988, and has not been reprinted. The story concerns Detective Ralph Sandars of the Hawthorne, California drug squad during the 16 hours between the end of one shift and the start of his next. Police have been dealing with a new drug scourge, caffeine, and the story reflects Sandars' thoughts on the matter. It ends with an O. Henry style twist ending.