Thud! is a fantasy novel by British writer Terry Pratchett, the 34th book in the Discworld series, first released in the United States on 13 September 2005, then the United Kingdom on 1 October 2005. It was released in the U.S. three weeks before Pratchett's native UK in order to coincide with a signing tour. It was nominated for the Locus Award for Best Fantasy Novel in 2006. Plot As the book opens, a dwarf demagogue, Grag Hamcrusher, is apparently murdered. Ethnic tensions between Ankh-Morpork's troll and dwarf communities mount in the build-up to the anniversary of the Battle Of Koom Valley, an ancient battle where trolls and dwarfs seemingly ambushed each other. Lord Vetinari persuades Commander Vimes to interview a vampire applicant to the Ankh-Morpork City Watch. The new recruit, Lance-Constable Salacia "Sally" von Humpeding, along with Sergeant Angua and Captain Carrot, is attached to the investigation surrounding Hamcrusher's death. Meanwhile, Corporal Nobbs and Sergeant Colon begin an investigation into the theft of the fifty-foot painting, The Battle of Koom Valley by the insane artist Methodia Rascal, from a city art gallery. Most of the populace believe the painting holds clues to a treasure hidden in Koom Valley. Nobbs has a new girlfriend, exotic dancer Tawneee; Nobby first caught her eye when slipping an IOU into her garter. Other subplots involve the tension between vampires and werewolves (new recruit Lance-Constable von Humpeding and Sergeant Angua), and the presence of Vetinari's auditor, A.E. Pessimal, in the Watch House. Vimes finds himself pressured by Lord Vetinari to solve the murder quickly, before inter-species war erupts in Ankh-Morpork. Vimes and Sergeant Angua visit the dwarves' under-city mine, where a nervous dwarf named Helmclever draws a mysterious sign in the spilled coffee on his desk. In a fit of his particular brand of omnidirectional anger, Vimes veers off into the mine where he cuts himself, he supposes, on a locked door. Later, he persuades the deep down dwarves to allow Captain Carrot to be the "smelter" who looks for the truth of the murder. When Carrot tries to find that truth, however, he is shown a body that was mutilated after death, and a confusing patch of clues. Angua discovers that a troll really was in the mine at the time of the murder, much to the consternation and fear of the dwarves who claimed a troll did the killing. This troll turns