The Nicene Council is offering a free eBook version of Kenneth L. Gentry's book, God's Law Made Easy. Gentry is an excellent theonomy exegete, and we recommended this to those who want a concise, precise explanation for the biblical basis for theonomy.
From the site:
Because of the nature of the modern debate and our special need for socio-political as well as personal norms, this book will focus specifically on the question of the relevance of the Old Testament Law today. Christians need to return to a whole-Bible ethic rather than a piece-meal it-seems-to-me morality. God’s Law Made Easy is a good place to start.
You can also purchase the paperback version here