This book is an introduction to debates in philosophy within the medieval Islamic world. It discusses a number of themes which were controversial within the philosophical community of that period: the creation of the world out of nothing, immortality, resurrection, the nature of ethics, and the relationship between natural and religious law. The author provides an account of the arguments of Farabi, Avicenna, Ghazali, Averroes and Maimonides on these and related topics. His argument takes into account the significance of the conflict between faith and reason, religion and philosophy. The book sets out to show how interesting these philosophical debates are, and criticizes the view that these arguments are of no more than historical interest.