J.K. Rowling's new novel for adults

Like many people, I'm a big fan of the Harry Potter books. So I was happy to learn that J.K. Rowling is publishing a new novel! So far, details are few, aside from the revelation that the new novel will be for adults and will be very different from her Harry Potter books. The purpose of the press release seemed to be to generate buzz for Little, Brown, the publisher of the new novel, rather than to provide any concrete information about the book itself. Regardless, if Rowling's novel is in a genre that I read, I will most likely read it.