Deep breaths people, J. K. Rowling is writing another children's book. Novels in the plural, I have so many ideas in my head. Actually I have written part of a children's book that I really love so I'm definitely going to finish that." No word was given on the genre of the book or whether it is in any way related to the Harry Potter series, but in discussing the forthcoming Potter play The Cursed Child, Rowling said "I've always said I'm not going to say never.