Cartheno's Fire: Companion to The Fragile To...
At 8 years old, Benjamin Lane doesn't seem to have too many troubles in life. But after visiting a strange fair close to his home one evening, he wakes up to find himself in a world he didn't recognise.
Benjamin is in the Fragile Tower, where the queen of the Cold Lands uses the powers of boys with magical ability to keep her strange and beautiful palace from crumbling. But Benjamin finds that the trance he is put in still lets him walk the tower in dreams, and that one of the other boys is walking there, too.
With a strange voice issuing him with instructions, and a weapon of enormous power to find, Benjamin finds himself in the middle of events he doesn't really understand. But luckily, that's never bothered him too much.