This book deals primarily with two Jewish philosophers: Maimonides and Rabbi Avraham Bibago. The author, the late Professor Abraham Nuriel, developed a new method to decipher the secrets of the 'Guide for the Perplexed' to Maimonides. This method is based on accurate examination of key terms in the book, and has revolutionized the study of Maimonides. In this book, Nuriel uses this method to determine Maimonides 'real' esoteric opinion about issues such as creation, supervision and faith. In his research on Bibago, Nuriel presents a fascinating independent philosopher, well versed in Jewish, Christian and Muslim philosophy, who was active in the last generation before the expulsion from Spain.