In all honesty, I went into this book because I loved the European movie Bluebird In My Heart, that was based of this. Of course there's going to be differences. All film adaptations do.
In this case, with exception with the ending, the movie treated the story better.
Our lead Bill, in the book, is a bit too close to being a pervert constantly commenting on the sexual nature and attractiveness of a girl he knows is 14. Half this book tries to defend Bill, show as basically an okay guy trying to right his life. Then in the next page, he's thinking how sexy this child is.
The movie, at least, puts effort into having our main character show how uncomfortable he is around the girl, who I believe is a couple years older in the film. It does a great job showing his struggle to adapt to life outside prison. His awkwardness. The book kinda loses that rather quickly.
The last third of the book does bog down a bit with flipping perspectives to the mafia bad guys. When the violence comes, it is in small spurts that we see coming.
I will say though, I think the end of the book is definitely better. The general story is a good idea. The pacing is good. The language though makes it feel like it was written in the 1980s.
Overall, meh. Had promise. But there isn't much to redeem in our lead guy Bill.