Raising Steam

Depending if you're counting the Tiffany Aching books a separate series or part of the Disc World novels either this or The Sheperd's Crown is the last Disc World novel. Of course, it is not as good as some (most?) of the older books which may be attributed to the fact that it is the 40th novel in the discworld universe or to Sir Terry Pratchetts deteriorating health at the time of writing. Nevertheless, it's still funny (in places) and a final meeting with the characters we learned to love and laugh about during the last 30+ years. Thanks, Sir Terry.