This is an introduction to the philosophy of the 13th century Franciscan John Duns Scotus. The text brings together key insights of Scotus's theory of cognition, metaphysics and ethics in a comprehensive and unified manner. The authors use critical texts and the most recent scholarship on Scotus to introdce the inticrate vision of the "Subtle Doctor" to a wide audience. This volume offers a point of entry into the world of medieval philosophy and its connection to questions belonging to natural theology: the existence of God, divine freedom and perfection. It presents historical information on Scotus himself, but additionally on the philosophical context in which he taught. The authors explicate his thought in light of the dominnt questions of the late 13th century. The integrative and comprehensive presentation of the essential elements of Scotus's philosophical vision makes this book a useful resource. Basic concepts are explained for the non-specialist, while discussions of Scotus's conceptions should be of interest to those already familiar with his work.