The World of Shannara written by Terry Brooks and Teresa Patterson is the companion book to the bestselling Shannara books by Terry Brooks. The first version contained information about subjects in the books up until at least The Voyage of the Jerle Shannara. This includes such detailed information as an Ohmsford family tree, a complete map of the four lands and details on what happened to certain characters after their respective books reached their conclusions. An updated edition includes all Shannara books published as of '09