As J.K. Rowling’s U.S. publisher of children’s books — and with more than 150 million copies of the Harry Potter series in print in the U.S. — we know firsthand just how passionate J.K. Rowling‘s fan base is. (We are, too!) Today we’re all buzzing with the news that Rowling has written a new book — this time for adult readers!

Little, Brown will publish Rowling’s first novel for adults. The title, date for publication, and further details will be announced later in the year. Looks like 2012 will be another exciting year for book lovers! Check out the details from The New York Times, MediaBistro, and TIME Magazine.

For those of you wondering what it will be about, Rowling said, “Although I’ve enjoyed writing it every bit as much, my next book will be very different to the Harry Potter series…” She continues, “The freedom to explore new territory is a gift that Harry’s success has brought me…”

Excited? Leave your comments below!