Men at Arms by Terry Pratchett

This novel features the City Watch and the discovery of the gonne, a dangerous weapon. It took me a long time to get into the story line, and at times I had trouble following exactly where Pratchett was going, but once I got into it, I enjoyed the story. I particularly liked reading about Vimes (whose impending marriage disrupts his career and habits) and the integration of trolls and dwarfs into the Watch.