Make Your Selection: Before She Disappeared by Lisa Gardner

Frankie Elkin is an average middle-aged woman who spends her life doing what no one else will -- searching for missing people the world has forgotten. When Haitian teen Angelique Badeau vanishes from her high school, resistance from the police and the victim's own family tells Frankie she's on her own. Asking questions someone doesn't want answered, Frankie will stop at nothing to discover the truth. Even if it means the next person to go missing could be her.