Alvin Journeyman
Tales of Alvin Maker, Book 4

Alvin is a Maker, the first to be born in a century. Now a grown man, Alvin has returned to the town of Vigor Church to teach the knack of being a Maker to anyone willing to learn. He has a vision to fulfill: a Crystal City of Makers. But his ancient foe, the Unmaker, has found new hands to do his work of destruction.