Not much. I've checked the HPsites I know and its still a secret. I could only find that its for adults.(well it doesn't really matter. we'll read it anyways!)I found in the Leaky Cauldron that JK's said it was as interesting to write as the HPseries and that she learned a lot from 글쓰기 HP so it has helped her a lot for the book.But it's not really "related" to the Harry Potter series. I would have LOVED her to write about Albus Severus,still I'm glad that she has written something. Hope its good!