The Discworld sits on the back of 4 Giant Elephants, who in turn stand on the back of the Star Turtle the Great A'tuin. What couldn't happen in a place like that?
The legends talk of a "fifth elephant" who during the formation of the world fell off the back of the great trutle and fell to the world in a ball of flame....... causing continents to break and all manner of creatures to go extinct........... all irrelevant to this books plot
When a struggle for power in Uberwald calls for a diplomat to be sent from the famed City of Ankh Morpork who does the Patrician send?
Why Commander Vimes, Commander of the City Watch, recently the Duke of Ankh, hardened copper and reformed alcoholic - who else? Oh yes, and he's the last decendant of the executioner of the last King of Ank-Morpork
With a country ruled by warring Dwarfs and Trolls, Vampires and Werewolves maybe only a Watchman turned diplomat can get to the bottom of it all?
An excellent read, but if you are interested then read the first in the "series", "Guards, Guards!"