Some thoughts on JK Rowling's new book

The news has been out for almost a week now, JK Rowling is coming out with a new book for adults. After I got over the initial OMGTHISISAWESOME reaction, I had a few questions. For one, how good of a book will this actually be? It's hard to tell. While Harry Potter was a book that appealed to an enormous age range, there is a simplicity and starkness to the characters and to the writing style that lends itself particularly well to Young Adult literature.

Rowling's characters are either pure good or pure evil, and the plot line is rather straightforward and simplistic. This is part of what made the Harry Potter books so wonderful, but also what makes me worry about a future adult book by Rowling. I question whether a book written for adults would be able to hold this type of narrative structure as well and if adult characters might be harder to relate to in this context. Her sentence structures and syntax reflect this simplicity, and Rowling has received critique in the past for prose's lack of finess and subtlety. How will this hold up in a book for adults? This isn't to say that YA books aren't well written, or that Rowling can't write. Clearly, anyone who has sold billions of books and written THE iconic book of an entire generation is doing something right, but I still worry that this new book will somehow change the god-like image I've built up of Rowling in my head.