Overboard — Dawn Lee McKenna

Due to a past trauma, Lt. Maggie Hamilton has a paralyzing fear of sharks that has kept her out of her beloved Gulf all her adult life. 

When a group of drug dealers dumps the Sheriff's Office investigator overboard one night, leaving her to her fate, Maggie finds herself in the middle of her most terrifying nightmare, with no hope of waking up safe in her own bed.

To survive, Maggie must not only meet her fear head on, but overcome it, so that she can stay alive long enough to be rescued or make her way back home. 
Maggie's husband, former Sheriff Wyatt Hamilton, and the town's most notorious criminal, Bennett Boudreaux, join forces in a desperate search for Maggie. 

They're in a race against time to save her before the Gulf, her fear, or the thing she fears most takes her life.

The Forgotten Coast Florida Suspense series has been a perennial bestseller, known for its immersive old Florida atmosphere, textured character development and dry humor. The series does not feature sex or graphic violence.