Crown of Ashes. Hearts of the Hollow Court, #2

A witch with forbidden power. A fae warrior torn by duty. A bond that could unite-or destroy-an entire realm. After the events of Marked by Thorns, Seren Elowen finds herself at the heart of a storm she never meant to start. Now a symbol of rebellion in the fae realm, her very presence threatens Queen Ilyra's fragile rule. Seren's magic is changing-growing beyond her control-and the realm is watching.
Kael Thornhart was trained to hate witches. Now he's bound to one by ancient magic and a bond that cuts deeper than any blade. But when whispers of betrayal echo through the Hollow Court, Kael must decide if his loyalty lies with his blood... or his heart. As political unrest deepens and a long-buried prophecy surfaces, Seren and Kael must navigate dangerous alliances, unravel lies, and face enemies on both sides of the divide.
Perfect for fans of Sarah J. Maas and Rebecca Yarros, Crown of Ashes is a breathtaking sequel filled with forbidden magic, slow-burn romance, and a realm on the edge of war. Book 2 in the Hearts of the Hollow Court series.