The Complete Guide to Middle-earth: from The Hobbit to The Silmarillion is a reference book for the fictional universe called Middle-earth of J. R. R. Tolkien's legendarium, compiled and edited by Robert Foster. It was first published in 1971 under the title A Guide to Middle-earth. A revised and enlarged edition under the title The Complete Guide to Middle-earth was published in 1978. It received a third edition in 2001.