It's hard to rate this book. I didn't "love it" as five stars suggests, but it's masterful and it messed me up, and it's going to stay with me for a long time to come.
The book is told in alternating perspectives; from Sadie's POV and then in the form of a podcast produced by a journalist reluctant to pursue this story, but still determined to bring the missing Sadie home to her surrogate-grandmother.
Reading about Sadie's life, even before the revelations in this book, was gut wrenching. Kids live like this. I know it, but I don't know it, not truly.
After a great deal of consideration, I'm putting this book in my classroom library with a note at the end for my students to please come to me if they deal with the issues in this book.