But the fact of the matter is that there is nothing to keep someone from writing about other books. That's all he's doing. I think it's fair game. She will get 'credit' all over the place. He can't leave her out. JKR is synonymous with HP.

Why is it fine for him to donate and not fine for him to profit from all his hard work (the cataloguing) too? People will buy the book. He'll offer the unofficial version and she'll keep writing and offer the official encyclopedia. She'll still profit. I will probably buy both.

He's not using her characters to create new work.