The Mark of Eden — Nancy Thames

After a frantic call from a couple on their honeymoon, Jillian returns to Half Moon Bay to help. Two elderly men are found dead in their recliners, and now another man is missing. This time it's the distraught father of the bride, Jillian's personal assistant Cecilia Montoya. Their investigation must be incognito since the groom, Detective Walter Montoya, can't work on the case due to a conflict of interest. The clues culminate with Jillian and Teddy taking a cruise to Catalina Island, but it's only an entree into a strange clinical world where she almost becomes a victim herself. Will Teddy be in time to save the day?