Book: Going Postal
OK, having trashed one Terry Pratchett book, with apologies to all his fans including myself, let me just say that this one is up to standard. I actually found it a little less twisted than the average discworld book, but I found the story equally appealing, incredibly funny, and even a bit more suspenseful.
Ankh-Morpork has a new postmaster, who is very motivated to do his job.
The rest is history, provided we can figure out how that works.