Was an ok read. Felt a bit too much like a fan fiction novel.
I know this is set up for the stage and I'm sure it would be amazing as a show. But as a stand alone book, or a sequel to the main books this does not feel the same. There is far too much crammed in.
If this was rewritten by J K Rowling it might stand up better. Worth a read if you are a HP fan. But I would not say this is a cannon story.