Acorna’s twin daughters race to protect her legacy—and save their world—in this epic series finale with “plenty of stirring adventures” (Publishers Weekly). Khorii, the rebellious daughter of Acorna, the near-mythic heroine of her people, has tried to follow in her mother's footsteps in this time of plague and terror. But the pressure on the courageous young woman to succeed is tremendous, and the legacy she is expected to fulfill is overwhelming. The insidious enemy that has ravaged countless known worlds has left Khorii’s illustrious parents too weak to oppose it. Now, as the deadly foe prepares to launch its devastating final assault, it falls to Acorna's children—Khorii and her newly discovered sister, Ariin—to halt the brutal attack once and for all. But victory may prove too difficult, elusive, and ultimately fragile—and even time itself may be conspiring against the daughters in their desperate battle to save their family . . . and their universe. This is the dramatic conclusion to the breathtaking saga of the children of Acorna and Aari, from the Nebula Award–winning, New York Times–bestselling authors. “This popular adventure series demonstrates the storytelling expertise of co-authors McCaffrey and Scarborough.” —Library Journal “Fans will appreciate the authors’ genuine feeling for their human characters as well as for cats and dragons.” —Publishers Weekly