Of Scars and Stardust — Andrea Hannah

After the attack that leaves her little sister, Ella, close to death in a snowy cornfield, Claire Graham is sent to live with her aunt in Manhattan to cope. But the guilt of letting Ella walk home alone that night still torments Claire, and she senses the violence that preyed on her sister hiding around every corner. Her shrink calls it a phobia. Claire calls it the truth.

When Ella vanishes two years later, Claire has no choice but to return to Amble, Ohio, and face her shattered family. Her one comfort is Ella's diary, left in a place where only Claire could find it. Drawing on a series of cryptic entries, Claire tries to uncover the truth behind Ella's attack and disappearance. But she soon realizes that not all lost things are meant to be found.