Book excerpt: The tradition of philosophy in the Persian-speaking world is extraordinarily rich, creative and diverse. This anthology, which is divided into three volumes, aims to communicate something of that richness and diversity. The term 'philosophy' is understood to in its widest sense to include theological debate, philosophical Sufism and philosophical hermeneutics (ta'wil). Extending over a period of more than two millennia, and showcasing translations by well-established scholars, the anthology offers full bibliographical references throughout. For anyone interested in exploring, in all their varied manifestations, the fascinating philosophical traditions of Persia, such a wide-ranging and ambitious work will be an indispensable resource.