According to the Pottermore Twitter page, an 8th book in the Harry Potter series will be released this summer! Based on the stage play that is currently in rehearsal, Harry Potter and the Cursed Child will see the return of Harry, Hermione and Ron as adults. Now let me be clear, this is a script book of the stage play, so it will more than likely read just like a script would for a play, stage direction and all. Whether or not it is rewritten to a more novel style remains to be seen.
Entertainment Weekly is currently reporting that publisher, Scholastic, will publish the hard copy book later this year with an Ebook version to be released on Pottermore.com at the same time.
Also, die hard fans will get a kick out of this; The Special Rehearsal Edition of the book will be released on none other than on Harry’s birthday, July 31, 2016! A Definitive Collector’s Edition will be released at a later, as of yet unknown, date.