The Truth by Terry Pratchett

This book spoofs the publishing industry as Ankh-Morpork gets its first newspaper just as the Watch uncovers a plot to unseat the Patrician. This book was definitely one of the more humorous and well-conceived entries in the Discworld series: it works! The plot hangs clearly together and I found the humor especially well done (Gaspode, the talking dog, is one of the newspaper's first sources, but he speaks to the newspaper anonymously as Deep Bone, for example).