In fact, the Pottermore division has conjured up the Book of Spells, a book-video game hybrid, selling for $39.99. Sounds confusing, huh? Well, it's a book, and a game, which features some original writing from J.K. Rowling, as well as activities where you can use spells from the books in a video game, and the release date is unknown. Other than that, things are pretty unclear (and from what I can tell, it seems like fire doesn't actually come out of the book).
Source: LA Times