When Creighton Castle defends his wife during a robbery attempt at his home, he shoots and kills three young teenagers. One of the boys is a fourteen-year-old illegal immigrant from Mexico whose father is a barbaric hit man for a Mexican drug cartel. The man is a sicario-the most heinous type of hired assassin, skilled in the ways of kidnapping, torture, and murder. The other two teenagers have ties to a savage Houston street gang. While under investigation, Creighton seeks protection under the state of Texas' Castle Doctrine law and soon finds himself embattled in a multi-front war crossing legal, emotional, and moral boundaries. But defending his home was only the beginning and Creighton's biggest worry becomes fear of revenge. With his family at stake, Creighton realizes it is his need to trust in God for protection more than a gun. CASTLE DOCTRINE is a unique thriller with a raging storyline intertwined with today's political tensions over the controversy of gun control and an individual's right to protect one's self and their property using deadly force. The story is highly relevant to current issues surrounding illegal immigration, border security, gun rights, religion, and Mexico's violent drug war.