Dead Tide by Jane Marks

Beachgoers are being killed in the seaside tourist town of Cape August right before the kickoff of the summer season. But instead of a shark being the cause for terror, it’s a serial killer.

Business owners are on edge when the fate of their livelihoods (and lives!) lies in the hands of an outsider: a young, strikingly beautiful but cold woman named Roslyn Hunt. Leading her FBI team, Hunt must navigate the complexities of the tight-knit community while forced to keep a secret of her own.