DUTY TO PROTECT Thirty feet underwater when her oxygen tank fails, Caley Flynn fears it's been sabotaged--and she'll be the next to die. Her intern's already dead, her home breached and something's amiss at her Florida marine-life rescue center...but no one believes she's in danger. Except Shepherd Lightman. When Caley's brother asked him to check on her, the marine turned security specialist hoped it would be a case of calming down a nervous veterinarian...