After the phenomenal success of the Harry Potter series globally, J.K. Rowling is all set to publish a new novel for adults.

Although I've enjoyed writing it every bit as much, my next book will be very different to the Harry Potter series, Rowling said on her official Web site, which is currently being refreshed. Further details will be announced later in the year, according to the site.

The plot and the title are still not disclosed. But Little, Brown and Company, part of the Hachette Book Group, have acquired the rights to publish the book. Bloomsbury who published all Harry Potter books won't have any hand in this new adult fiction endeavor by Rowling.

Rowling said in a statement, 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, the excited writer said.

The book is said to be released in the print and e-book form.

Her seventh book in the Harry potter series sold more than 30 million copies in the UK itself and 450 million copies worldwide. The eight movies from the Warner Bros. studios have the largest-grossing franchise in history, which took home more than $7.7 billion at global box-offices.