Fans of Harry Potter should read these!
The Worlds of the Chrestomanci series by Dianna Wynne Jones.
I read these long before Harry Potter came out and loved them.
There are about 6 books altogether I think and are set in a sort of parallel universe with witches and wizards etc. The main character is the Chrestomanci who is sort of like Dumbledore.
The first book was published in about 1977 and in my opinion J.K.Rowling copied the basic idea in these stories for Harry Potter, and in my opinion the Chrestomanci books are by far better written.
Anyway. They are more aimed at kids but have a read. Or get them as presents for siblings/nephews/nieces etc.