As noted, Pratchett's daughter, Rhianna, his literary executor, will not authorize any more Discworld novels.
Pratchett once told me: "The Tiffany Aching series is what I would most like to be remembered for."
Shops opened at midnight and included Waterstones in Piccadilly, central London, where the author's friend Rob Wilkins read an extract to 200 ticket-holders.
I haven't read this one yet, but I'm going to be getting my copy ASAP, and, just like you, I'll be reading it straightaway.
The Shepherd's Crown [Terry Pratchett/Harpercollins] – Preorder for Sept 1
The Shepherd's Crown [Terry Pratchett/Doubleday] – On sale now (in the UK)