More fine fantasy trash, from Garth Nix. Miranda brought them back, on a school friends recommendation, and now I've read all three, quite quickly. Though there is also a fourth.
Another world, with magic, in communication with one without magic, only this time instead of the usual world-flipping whatever, they're just separated by a wall, and so the expected fun ensues.
Its "young adult" and you can see that in the characters, young people growing up and unsure of their place in the world, gradually growing in confidence. And this is part of the charm; if I wanted to read adult books, I would.