It is a testimony to Terry Pratchett that The Compleat Ankh-Morpork: City Guide – which is, after all, a guide to a city that does not actually exist – can still come across as being a guide (complete with ads) to a city that could exist. Provided, of course, that a city that included dwarves, trolls, vampires, wizards, thieves, assassins, imps, and barbarian heroes among its citizenry could exist, whether sitting on a flat Disc on four elephants on a turtle swimming through space, or not. Probably not. Although we may be just not looking with a big enough telescope.
Anyway, if you like the Discworld this would be a handsome addition to your library. Including the map! – Which I don’t know what to do with, honestly: I already have a map of Ankh-Morpork framed, and on the wall.