Sunken Shadows by Kathleen Brooks

As a rescue swimmer for the Coast Guard, Wade Faulkner was used to unpredictable situations. But an emergency call late one night turns his life upside down. After finding a boat on fire, he discovers a dead body and a visibly shaken woman in need of rescue. Now he finds himself entangled in a murder mystery between two teams of treasure hunters out for the discovery of a lifetime . . . and he’s falling for the main suspect.

Darcy Delmar survived an explosion on her boat while racing to be the first to find a sunken treasure she believes to be worth more than most people can possibly imagine. Now she is the lead suspect in the murder of a fellow treasure hunter. Or is she simply the next victim?

As Wade and Darcy lose themselves to the passion of the hunt and a new love, one thing becomes clear: this is a treasure worth killing for.