Sadie by Courtney Summers

• Nineteen-year-old Sadie Hunter's life has not been easy.  She's spent most of it caring for her younger sister, Mattie, without a father and with no help from her drunk and drug-addled mother (who eventually abandons her daughters when Sadie is sixteen).
• When Mattie is found dead in a field, Sadie goes on a road trip in search of her sister's killer, upon whom she intends to take the ultimate revenge.
• Sadie's gripping first person perspective as she follows one clue after another in search of Keith is interspersed with episodes of a true-crime podcast called The Girls which chronicles Sadie's and Mattie's story.

I was biting my nails all the way through this excellent mystery/thriller, hoping against hope that Sadie and Mattie would get justice and that Sadie wouldn't end up just "another dead girl."

Grades 9-12