Blood Harvest is an original novel written by Terrance Dicks and based on the long-running British science fiction television series Doctor Who. It features vampires in common with Dicks's 1980 television serial State of Decay and makes reference to that story's events as well as to those of The Five Doctors. The events of this story are concluded in the first of the Virgin Missing Adventures novel Goth Opera by Paul Cornell. A prelude to the novel, also penned by Dicks, appeared in Doctor Who Magazine #214. Source: Wikipedia (en)