The author of the world-renowned children's series is switching to an older audience.

Almost five years after publishing the last book in the Harry Potter series J.K. Rowling is writing an adult novel, according to L.A. Times. But little else is known at the time. The title of the book, which is set to hit the store shelves in U.S. and Britain simultaneously (at an unannounced date), has not been revealed. Little, Brown – the publisher of the the Twilight series – has the rights to the book.

Rowling said the following about the deal in a press release:

"Although I've enjoyed writing it every bit as much, my next book will be very different to the Harry Potter series, which has been published so brilliantly by Bloomsbury and my other publishers around the world. The freedom to explore new territory is a gift that Harry's success has brought me, and with that new territory it seemed a logical progression to have a new publisher. I am delighted to have a second publishing home in Little, Brown, and a publishing team that will be a great partner in this new phase of my writing life."