Katie MacGregor has saved kingdoms. Now she must survive herself.

After the disastrous Winter coronation, the High King of faerie is left bleeding cold into the tropical heart of Avalon. Katie MacGregor?mortal-born knight and unwilling princess?will do anything to save him. But the man she loves is slipping away, and every attempt to break his curse crumbles in her hands.

When an escaped traitor allies with Summer's greatest enemy and an army of ogres, the fragile peace between the Courts shatters. Shadows creep through both realms, threatening to smother Faerie in corruption and chaos.

As Avalon teeters on the edge of war, Katie's power grows dangerously unstable, Every spell she casts steals a little more of her strength, scorching her from the inside out. To save her king and the worlds they both call home, she must face the truth she's feared all along: the magic of Summer isn't hers to command. It's hers to survive.

Now, as the Seasons march toward war, Katie must choose between her heart and her crown. Between mercy and survival.

Between the girl she was and the weapon Summer made her to be.