I just finished the book The Prodigal God by Timothy Keller. It's about the parable of the two sons (previously known as the prodigal son). It's pretty amazing. I checked it out from the library but I think I'm gonna need to buy it sometime. Lots to underline. And lots to take in so I need to re-read.
I highly recommend this book.
the definition of prodigal is: 1. recklessly extravagant and 2. having spent everything