
Possibly my favourite New Pratchett book, the ridiculously-named Moist von Lipwig is a con-artist who is forced to go (mostly) straight as he takes over the Ankh-Morpork Post Office.
The last few chapters were particularly interesting, re-reading them in the credit crunch era, with the idea of companies too big to fail being discussed and descriptions of ‘Finance’ as the fantasy of money.
Oh yeah, and it was funny too.