Hidden In The Everglades by Margaret Daley

Bodyguarding is Kyra Morgan's business–but this was supposed to be a vacation! Still, she can't refuse the request from childhood friend and neighbor Michael Hunt. Michael's sister Amy ran away after witnessing a murder. Michael needs Kyra's help to find her and keep her safe. Yet as Kyra and Michael follow the trail along the Florida coast, their search grows more dangerous by the day. Terrorists are at work, and the stakes are perilously high. It will take everything they have–including trust they're both reluctant to give–to escape the Everglades alive…