The Prodigal King is a modern-day spin on the Bible story of the Prodigal Son. The Prodigal King is a fictional book brought up to modern times with references to biblical text throughout. The New Testament of the Bible tells the story of a prodigal son in Luke 15. The Prodigal King book is also about a prodigal, but takes place today. While The Prodigal King is a fictional story, it references many truths of the Bible in the endnotes. Modern day Prodigal Son story. It the author's intention to tell an entertaining story, but also tell a story that contains the truths of God and to get His message out to feed both the soul and the spirit.