Already a spoiler thread.
And it's more likely than not that that leaked book is fake. Especially considering the fact that there's several leaked 'books' around right now.
They aren't from the 'leaked' book.
They're from the book that was photographed page-by-page. Unless someone went through the trouble of actually binding a totally DIFFERENT fake book, stealing a deathly hallows cover, finding the perfect print, and photographing all seven hundred some-odd pages, those are entirely accurate spoilers.