Where can I find magical animals, magical quidditch balls, Harry Potter encyclopedias and the school history of Hogwarts and Suzhou?

The history of Hogwarts has not yet been published. But you can see the electronic version online. . I wonder who wrote it.

Fantastic Beasts and Where to Find Them and Quidditch Ball were both published, but they were out of stock long ago. It is impossible to buy it in the bookstore now. These books are all Rowling's charity books, which were published ten years ago. Now that the copyright period has expired, it is impossible to reprint it. So it is impossible to buy. (Unless adult fans turn their heads. . . . . )

Encyclopedia is made up by fans. I should buy it. There are all kinds of Harry Potter encyclopedias on the market now, and you can buy them in bigger bookstores. But I don't think you have to buy it. Either you know all the information yourself or you can find it online.