The Unicorn Hunters (hardcover) Katherine Arden

Anne of Brittany was a child when France invaded and drove her royal father to his death. Now she is a young woman, sovereign duchess of an occupied realm, and France means to crown their conquest by marrying her to their king. Such an alliance would put her title, her lands, and her body forever in the hands of her enemies.

But Anne refuses to be the last duchess of Brittany.

Her only hope of resisting conquest is another alliance sealed with marriage, so Anne arranges a daring last gambit: a secret betrothal to Charles of France’s greatest rival. But secrets are hard to keep in a world where rival courts spy on each other with diviners.