This volume collects several invaluable essays not only for the specialist or those interested in ancient philosophy or the history of philosophy. It is also a source of exegetical and conceptual riches in the form of rigorous discussions of crucial philosophical problems, theses, and arguments. Even the papers which are reviews of other theorists' works are characterized not only by astute critical spirit but also by a wealth of positive proposals ... Barnes's volume of collected papers on method and metaphysics is indispensable: it contains works of scholarly excellence, advances arguments of admirable clarity and cogency, and raises all the crucial questions growing out of the fields it examines. The volume itself is beautifully presented, includes new footnotes with helpful citations of most of the original Greek texts discussed, and retains (in brackets) the pagination of the papers in their original place of publication. (Michail Peramatzis, Mind)