Search - Breathless (Athena Force, Bk 24)

U.S. Marine Corp Combatant diver and Athena Academy graduate Jessica Whitaker leads a military exercise with newbies when she realizes someone sabotaged their training. Before seeking safety for herself, Jessica makes sure none of the participants are left behind as she is a marine.
Soon after that the Athena Academy asks Jessica to find a three-year old shipwreck and recover a laptop from it. Assigned to help her is expert marine salvager and computer guru Zach Holiday. Jess and Zach are attracted to one another from the onset and share euphoria when they find their undersea objective. HoArachne has sent troops to retrieve the laptop from them. The pair depends on one another to avoid a watery grave.