The Discworld Companion is an encyclopaedia of the Discworld fictional universe created by Terry Pratchett and Stephen Briggs.The book compiles a precise (and often quoted directly from the books concerned) definition of words, lives of historical people, geography of places and events that have appeared in at least one Discworld novel, map, diary, non-fiction book and the short stories "Troll Bridge", "Theatre of Cruelty", and "The Sea and Little Fishes".The first edition was published in 1994 and listed information from all the novels up to Soul Music, as well as the first two short stories.The second edition was published in 1997, and adds information up to Maskerade.The third edition named The New Discworld Companion was published in 2003.