American Royals IV: Reign by Katharine McGee,

American Royals IV: Reign continues the high‑stakes drama of America’s fictional royal family. Queen Beatrice is in a coma, Princess Samantha is missing, and Prince Jefferson is acting king, creating a power vacuum filled with political tension, romance, and long‑buried secrets.

The story centers on themes of duty, love, betrayal, and the future of the monarchy, bringing the bestselling YA series to its conclusion