I don't remember that Scribd even existed the last time I saw a version of this map, but here is this map in case it sparks ideas.

I got as far as writing down a couple of titles to investigate at the local library, last time, because I didn't particularly love The Color of Magic (its mild Americanization probably was not the issue). Then the library didn't have them. (It does have Going Postal--now--because Pratchett has become yet more popular in the States since my last attempt!)