Little Girl Lost: Book 1 — Alexandria Clarke

When the seventeen-year-old star of the high school softball team vanishes from a small town, the victim's estranged older sister, Bridget Dubois, returns home in order to find her. The only problem is that Bridget has a reputation, and the locals aren't pleased by her reappearance. Without anyone to help her, Bridget must find a way to reconnect with her younger sister before time runs out.