From audible.com:

Filled with magic, heroism, and all-too-human characters, Bujold's Sharing Knife saga is both a gripping adventure and a poignant romance. In this third volume, Fawn, the young farm girl, and Dag, the seasoned soldier-sorcerer, set off to find fresh solutions to the perilous split between their peoples - and encounter new hazards both human and uncanny.

The farmers and riverfolk have long distrusted the power of the mysterious and aloof Lakewalkers, even though they depend on them for protection from the evil malices. The proud Lakewalkers, meanwhile, have exiled Dag after learning of his marriage to Fawn, the first outsider to be bound to a Lakewalker in their magical way. But as Dag's natural Lakewalker ability to manipulate "ground energy" begins to develop in dangerous directions, he and Fawn realize that big changes are ahead.

Don't miss the other volumes of The Sharing Knife.