A brush of skin against skin changes everything … forever.

On a hike deep in the Rocky Mountains, Kai Monahan watches as a dozen dragons—actual dragons—battle beneath a fat white moon. When one crashes nearly dead at her feet and transforms into a man, Kai does the only thing a decent person could: she grabs the nearest sword and saves his life.

But there’s more to the dragon shifter Rhys than an irresistible presence and steady starfire blue eyes. As he recovers from the attack, a chance brush of skin against skin binds him inextricably to Kai. With his own dark past, becoming heartsworn to a human—especially such a compelling one—is the last thing Rhys wants. But as an ancient enemy rises to pit dragons against humanity and with his strength nearly depleted, Kai has just become the one thing Rhys needs.

Soon, Rhys and Kai will be swept up in a hidden world of magic, political intrigue, and war. War that sprawls across the globe and threatens to swallow everything and everyone they hold most dear.

It's been two months since Kai Monahan's life changed forever. Retrieved from a suddenly unsafe Colorado by Rhys and taken to Eryri, the dragons' home in the South Pacific, she lives a secret existence. Rhys—for all his awe-inspiring power—is afraid to reveal to his people that he's heartsworn to a human. One he's quite possibly in love with.

Kai hasn't forgotten the terror or pain of the moment Rhys first took control of her mind and her magic, but neither has she forgotten the fire of his kiss. When she's discovered, dragon politics—not to mention spies and ex-lovers—threaten her growing feelings. Rhys has more enemies than he can guess, and someone close to him is playing right into their hands.

The war Rhys never wanted is coming. For either of them to survive, Kai must open her mind to him as never before. This time, there will be no turning back.

Months after bonding with Rhys, Kai is finding her place among the Wingless—humans who have heartsworn to dragons. Determined to help her new people, she's delving deep into her magical training and is the first Wingless to ride into battle with her dragon mate.

Going against customs as ancient as dragons, Rhys is forming his own vision for dragonkind. But the Council have plans of their own that don't include a Wingless queen. Meanwhile, the war with Owain is finally here and the fight for control of dragonkind could destroy everything—including humanity itself.

When unbreakable bonds are torn asunder, Kai and Rhys will learn exactly how deep their love goes. The battle has begun, and no matter what happens, this one will be the last. If they can't come together, their lives are forfeit—as well as every other life they hold dear.