Men at Arms/YMMV


 * Genius Bonus: There is a throwaway line partway in the book, when Cuddy and Detrius are chasing the antagonist, that he runs down Grope Alley, which the book explains the origin of the name is fortunately lost in the mists of time. This is very amusing if you happen to know that many streets were renamed to "Grope" from "Gropecunt".
 * Values Dissonance: Possibly the source of the biggest culture clash between British and American Discworld fans - the book has a very British attitude towards firearms that has caused some heated debate in the fandom.