I Need Book Recs

For my thirteen-ish cousin Michael, specifically. He actually likes fantasy (his favorite author is Rick Riordan)! I am so excited, y'all, the rest of the family is all Dean Koontz and Stephen King. I very much wish to encourage this, so I want to give him ebooks for Christmas, but I am kind of having trouble thinking of good YA with male protagonists. Like, I've got Only You Can Save Mankind and The Demon's Lexicon and the Owlknight trilogy, but I am blanking. That branch of the family is also more religious/conservative, so I hestitate to rec things like Good Omens.

HELP, PLEASE?