The book industry is about to get a boost from Harry Potter.
Harry Potter and the Cursed Child will be released globally at 11.01am on Sunday, New Zealand time. It is not a novel - it is a play.
The play has been having previews in London, and has its official opening this weekend.
The play is top of both the Amazon and Barnes & Noble charts based on pre-orders.
The New Zealand publisher Hachette is coy about exact numbers, but says the pre-orders have "surpassed expectations".