The Exquisite Torment of Loving Your Enemy (hardcover) Brigitte Knightley

Osric is a member of the Fyren Order, a guild of assassins who gleefully murder for money. Aurienne is a Haelan, a scholar-healer whose Order’s motto is Harm to none. Clear-cut absolutes separate them: good and bad, right and wrong, light and dark . . .

Until they don’t.

When Osric first bribed Aurienne to heal him, he never imagined those lines would begin to blur. But every healing session draws them closer together. He finds himself developing unwanted feelings for Aurienne as her capable hands heal his body—and his heart.