OOTP isn't out until the 21 June and reviews won't some out until after that date.
But on Tuesday two copies of the book were found dumped in a field near to the book's printing firm.
The man who found them telephoned The Sun newspaper who took them away until Bloomsbury collected them.
JK's spokesman said it looked like the books had been stolen from the printers.
Top secret
The paper promised they were keeping details of the storyline a total secret so it wasn't ruined for millions of Potter fans waiting for the Big Day.
Harry Potter and the Order of the Phoenix
But one of their muggle journalists says he has read it and has written about it.
He quite fairly doesn't give too much away in his review. But he does say it's a magical masterpiece and that JK drops a bombshell at the start of the second chapter.
And he said the plot's darker than we're used to.
That's all we're saying about it!
Photo clues?
The Sun published a photo of the OOTP copies found in the field, although they are not giving it to anyone.
Hear story
OOTP: From pen to bookshop
Vote: What would you do?
I won't be reading it on 21 June!
