Theme
The main theme of this book is prejudice as the Trolls and Dwarfs dredge up an old hatred and war in the Streets of Ankh Morpork. The issue is also brought forward by the addition of a vampire to the Watch against Sam Vines wishes. Vines faces his own prejudice against vampires and with the help of other Watch members overcomes this. He then is able to help the Trolls and Dwarfs with their problem by showing them an ancient cavern where Trolls and Dwarfs died as friends trying to bring peace to both races.