JK Rowling has revealed she has written a new book about Harry Potter's world - but only seven people will read it.
The Harry Potter creator has turned the Tales of Beedle the Bard - which was in the final Potter book - into a set of short stories.
There are only seven copies of the book in the whole world, and JK has already handed out six of them to her friends.
The seventh and final copy of the book is going to be auctioned soon for one the author's favourite charities.
JK said: "It was really to thank six key people, without whom Harry Potter wouldn't have happened, or wouldn't have been the same."
The Tales of Beedle the Bard
The Fountain of Fair Fortune
Babbitty Rabbitty and her Cackling Stump
The Wizard and the Hopping Pot
The Warlock's Hairy Heart
The Tale of the Three Brothers
One of the stories within the Tales of Beedle the Bard is of course the story behind much of the Deathly Hallows - The Tale of the Three Brothers.
Three others were mentioned in Deathly Hallows too, but there is one brand new story.
JK admitted she found writing this extra book useful: "It's been a wonderful way to say goodbye. It's like coming up from a deep dive.
"It's not about Harry, Ron and Hermione, but it comes from that world. I didn't expect it to be, but it's been quite therapeutic in a way. A nice way to say goodbye."
Encyclopaedia still to come
In the interview with a BBC journalist, JK said that she is still planning to write an encyclopaedia of Harry Potter - using the notes she has left from 17 years of working on the books.
Money from sales of the encyclopaedia will also go to charity.
JK also said that she was writing a "half-finished book for children" that would probably end up being the next book she published.