Across the Great Barrier (Frontier Magic Series #2)

From New York Times #1 bestselling author Patricia C. Wrede, the second in the series of magic on the western frontier.

Eff is riding west, away from the safety of the frontier city she's always known....
Eff could be a powerful magician if she wanted to. Except she's not sure she wants that kind of responsibility. Everyone keeps waiting for her to do something amazing--or to fail in a spectacular way. Worse, her twin brother, Lan, a powerful double seventh son, is jealous of all the a…