The Harry Potter play will be printed as a script book too. It will apparently be available the day after the play premieres. While I'm excited about the book, you would think they would give the play a better chance at doing well by releasing the print version later.
http://blogs.wsj.com/speakeasy/2016/02/10/harry-potter-cursed-child-book/?mod=e2fb
http://blogs.wsj.com/speakeasy/2016/02/10/harry-potter-cursed-child-book/?mod=e2fb