I’m looking for a book I read in the 80s (I think) about a world in which the typical magic was to be able to create things, but one boy is able to unmake things and everybody either wants to use him or kill him. It’s possible this boy is actually a girl, but I’m leaning toward it being a boy.
Stump the Bookseller
New format, same book stumper solving.
Two long-shot possibilities, though they’re both from a couple of decades later:
GIFTS by Ursula K. Le Guin (2004)
A FISTFUL OF SKY by Nina Kiriki Hoffman (2002)
Another long-shot, the Alvin Maker series by Orson Scott Card The first one is Seventh Son