No, sadly there will not be a next Harry Potter book.
There will not be another Harry Potter book.
Unfortunately, there will not be a new Harry Potter book.
All Harry Potter books are out. There won't be another book.
It is now 2018 and all the Harry Potter stories have been published already the last one was published in 2007.
There won't be another Harry Potter. All the books have been published and all the movies have been released.
After Harry Potter and the Deathly Hallows there won't be another book or movie in the Harry Potter series.
There isn't one.
J.K Rowling has said she won't write another Harry Potter book.
There are no more books.
J.K. Rowling has stated several times that she is finished with Harry Potter and will not write another book.
The next book? Harry Potter and the Deathly Hallows. And if you are interested, J.K. Rowling wrote another book: The Beedle and the Bard. Which is a book of short stories.