Dan Gruber is an author, teacher, and student of the Scriptures, often dealing with longstanding political and religious questions. He teaches the Bible and faith in Jesus the Messiah from a radical Jewish perspective which has led him to a stinging critique of the fundamentals of our laws and legal systems.
Most recently he has written, "Law Without Authority or Limits: Kelsen's Dilemma". Find the book here: https://www.amazon.com/Law-without-Authority-Limits-Kelsens/dp/1090343981/