Making Money (Terry Pratchett)

Classic Discworld mayhem and hilarity. The hero of "Going Postal" is back, applying his extensive past experience with running cons and minor thievery to a new challenge, now that the Royal Post is running so smoothly: The Royal Bank. Along the way he runs afoul of a Master Clerk who is more than he seems, a madman trying to become the Patrician through sympathetic magic, a cellar-filling hydraulic economic model, and golems. Great fun!