The anniversary of the legendary Battle of Koom Valley is approaching, where famously the dwarves ambushed the trolls and the trolls ambushed the dwarves and things in Ankh-Morpork are brewing since it’s the place where dwarves and trolls live closest together. When a dwarf is found dead, with a troll club nearby, Sam Vimes suddenly has his hands full, trying to avert a racial disaster.
As in all Pratchett books, there were some really awesome bits. But put altogether, Thud! was quite a let-down after Night Watch. It was the first time, I think, that I was not surprised by a Pratchett plot and the whole vampire vs. werewolf thingy got a little tired.