The Forgotten Girl — David Bell

The past has arrived uninvited at Jason Danvers's door...

...and it's his younger sister, Hayden, a former addict who severed all contact with her family as her life spiraled out of control. Now she's clean and sober but in need of a desperate favor--she asks Jason and his wife to take care of her teenage daughter for forty-eight hours while she handles some business in town.

But Hayden never returns.

And her disappearance brings up more unresolved problems from Jason's past, including the abrupt departure of his best friend on their high school graduation night twenty-seven years earlier. When a body is discovered in the woods, the mysteries of his sister's life--and possible death--deepen. And one by one these events will shatter every expectation Jason has ever had about families, about the awful truths that bind them and the secrets that should be taken to the grave.