Raising Steam: (Discworld Novel 40)

Its all change for Moist von Lipwig, swindler, conman, and (naturally) head of the Royal Bank and Post Office. A steaming, clanging new invention, driven by Dick Simnel, the man with tflat cap and tsliding rule, is drawing astonished crowds - including a few particularly keen young men armed with notepads and very sensible rainwear.