Sadie is a book about every horrible thing that can happen to a little girl, and a teenager who is doing her damned best to protect her little sister from all of what happened to her. And she fails.

It is a brutal, horrible book that is brilliantly written and will make your stomach turn, and I don't think you can say in general terms that it's not for kids or teens, because this shit happens to kids or teens, and many of them don't have the privilege to think of it as adult material.

I recommend listening to the podcast as well, although I'm a bit baffled to find that one episode is "missing" and the end of the story is not available in that format.