An undercover mission exposes hidden longings in the irresistible paranormal romance series from the New York Times bestselling author of Mating Needs.

The Alpha League Federal Agency’s sworn duty is to protect humanity from the worst of the paranormal universe. Wolf-shifter Agent Bryon Day has been deep undercover for more than a year, investigating a human trafficking ring, when he goes MIA. Since A.L.FA. never leaves an agent behind, a team is sent to save him—or bring his body home.

FBI agent and ace cryptographer Kari Tomlin is selected for the rescue task force. Under the ruse of a ditsy tourist, she searches an ancient European city for Agent Day. When she learns he’s locked up in the palace’s dungeon, she plans a covert jailbreak. Together they risk the dangerous, booby-trapped tunnels below the city for freedom…and a chance to discover if this really is a mate bond growing between them.