If the concept of tawhid is central to Islam and everything Islamic, it is because of its centrality to existence and everything that exists. Indeed, Islamic science, whether religious, moral or natural is essentially a quest to discover the order underlying the variegated world of multiplicity. The work of al shahid, Dr. Ismail Raji al-Faruqi on the subject of tawhid affords the reader not only a look on the axial doctrine of Islam, but also allows the reader to understand that doctrine from a number of different perspectives. In the endeavor to explain the simple truths of the doctrine of unity, Dr. al-Faruqi touches upon a broad spectrum of subjects, drawing elements from history, comparative religion, anthropology, philosophy, ethics, epistemology, archaeology, and other disciplines. As such, his concept of tawhid is rich in the depth of its erudition, abundant in its perception, and direct in its implications for life and thought. Indeed, it is perhaps this work more than any other that reflects the profound and original thought of Dr. al-Faruqi.