Long before he exasperated millions of Star Wars fans, Rian Johnson made “Brick”, a superb high-school crime film.
I appreciated the hermetic, no-adults-in-sight tone of the movie, and tried to incorporate some of that into Lords of Air and Darkness.
A couple of books that taught me a lot about writing for “young adults.”
No warlocks in either one, though. I had to figure that part out for myself.