A royal threat. A dangerous love. A feud that refuses to die.

After enduring the court's suspicion, Lord Peregrine Fitzroy has finally earned back his standing—and Charity's heart. But the arrival of her family in London threatens to reopen old wounds and reignite a bitter feud that once made their love impossible.

Charity, Duchess Atholl, is ready to stand beside the man who was once her enemy. Yet just as they begin to build a future together, foreign royals descend on London with secrets, schemes—and ties to a powerful adversary thought to be in hiding. Determined to uncover who is harbouring their most dangerous enemy, the couple is drawn into a tangled web of espionage, revenge, and political sabotage.

As whispers swirl of a plot to upend the royal succession, Peregrine and Charity must outwit an opponent who knows exactly how to strike where it hurts most. Loyalties will be tested. One misstep could cost them their love, their lives—or the crown itself.

Passion meets peril in this breathtaking finale of The Diamond of the Ton trilogy.

Expect: star-crossed lovers united against impossible odds; a Romeo and Juliet style family feud rekindled; high-stakes espionage, royal secrets, and sweet revenge; found family; healing happily ever after.

Book three of three—the explosive conclusion to a complete Regency romantic mystery trilogy filled with intrigue, redemption, and a love worth defying the Crown for.