The Newcomer by Mary Kay Andrews

When Letty Carnahan discovers her sister murdered and her niece in danger, she flees to a sleepy Florida beach town with only one clue—the name of a motel scribbled in her sister’s journal. Hiding out among quirky locals and long-buried secrets, Letty must uncover the truth before her past catches up with her. The Newcomer is a sun-soaked blend of mystery, romance, and second chances from the queen of beach reads.