In the 15th Discworld fantasy novel, Terry Pratchett has fun with hard-boiled police procedurals and racial diversity programs. Captain Vimes is preparing to leave the Watch to marry Lady Sybil Ramkin when his attention is captured by the mysterious murders of a dwarf and a clown, an exploded swamp dragon, and the theft of a dangerously compelling weapon from the Assassin's Guild. It all has something to do with an obsessed nobleman and yet another plot to restore the monarchy to the city of Ankh-Morpork, despite the fact that the rightful heir, the scrupulously honest Corporal Carrot, has no interest in being king.