Raising Steam by Terry Pratchett

You know, I'm very pleasantly surprised by Raising Steam. It's almost as though old Terry's back. It's great to return to Ankh-Morpork where Nobby is Nobby, Vimes is Vimes and Vetinari is Vetinari - or is he? Having a steam train in Discworld is a logical step in the series, and I thoroughly enjoyed the journey.