Though written in the language of a theologian, Tim Hegg's "Fellow Heirs" is about as concise and clear summary as I have read on the question of the Gentile believer's relationship to the Torah and to the people of God. His discussion of circumcision, dietary laws, and the Gospel is excellent. If you are Torah-observant, you should read this book. If you are not Torah-observant, you should also read this book, because it might change your mind.