The Sharing Knife Volume One (Sharing Knife, #1)

by Lois McMaster Bujold

[wyvernfriend]

Fawn Bluefield wants out of her family farm and into the outside world and Dag, a Lakewalker patroller attracts her and takes her under his wing. Lakewalkers are waging a war against "malices". Malices are immortal entities who draw life out of people and make them into warped versions of themselves.

When Fawn is taken by malices Dag has to rescue her and this changes their relationship forever.

Bujold is a great writer and I have never been disappointed by her, this is no exception.