1. This book is an exposition Jesus' parable commonly known as "The Prodigal Son" in Luke 15. Keller does a fantastic job opening up this parable to show its true meaning. I now have a more robust understanding of this parable. I'm thankful for Keller's careful and vibrant exposition.
2. This book is a helpful gospel presentation. Keller opens up the beauty of what Christ has done from Luke 15.
3. This book does a fantastic job exposing the legalism of the elder brother. Legalism is one of the most serious problems in the church today. Read this book and find yourself loathing your own self-righteousness.
There is also a DVD series of Keller teaching through this parable.