The Crystal City

the long version

Using the lore and the folk-magic of the men and women who settled North America, Orson Scott Card has created an alternate world where magic works, and where that magic has colored the entire history of the colonies. Charms and beseechings, hexes and potions, all have a place in the lives of the people of this world. Dowsers find water, the second sight warns of dangers to come, and a torch can read a person's future--or their hearts.