Islamic philosophy is a unique and fascinating form of thought, and particular interest lies in its classical (Greek-influenced) period, when many of the ideas of Greek philosophy were used to explore the issues and theoretical problems which arise in trying to understand the Qur'an and Islamic practice. In this revised and expanded 2001 edition of his classic introductory work, Oliver Leaman examines the distinctive features of Classical Islamic philosophy and offers detailed accounts of major individual thinkers. In contrast to many previous studies that have treated this subject as only of historical interest, he offers analysis of the key arguments within Islamic philosophy so that the reader can engage with them and assess their strengths and weaknesses. His book will interest a wide range of readers in philosophy, religious studies and Islamic studies.