From Lancre to Uberwald to Koom Valley you can plot out where everything is. I do find it most useful to put everything and the many varied locations in perspective. For example now you can see exactly how the witches flew to Genua or where Leshp was.

Accompanying the large map is a small booklet containing small biographies of the Disc's prominent explorers (those who were proper explorers anyway). These were enjoyable, but not quite the same as a Discworld story (though the normal humour was present in full). My only disappointment with the map is that I simply cannot locate Copperhead!

Just don't expect any earthshattering revelations about the nature of the Disc: "Exactly how [the internal layer of molten rock] is maintained, and how the water that pours ceaselessly over the rim from the Circle Sea is replaced, are but two of the unfathomable mysteries of the world."

A true Discworld aficionado shouldn't be without this mapp. But if you're a more casual reader then it might be best to leave things up to your imagination and Terry's wonderful descriptive language.