Ultima VI Clue Book: The Book of Prophecy

The Ultima VI Cluebook contains maps and descriptions of all the towns, dungeons, and other major locations in Ultima VI. There is also a complete walkthrough, as well as information about the cost of items, trainer locations, etc.

It is written in the form of a letter to the Avatar from Taynith and Mandrake. Mandrake generally handles the descriptions and gives general hints, while Taynith's additions are more specific.