A distinguished group of scholars of ancient philosophy here presents a systematic study of the twelfth book of Aristotle's Metaphysics. Book Lambda, which can be regarded as a self-standing treatise on substance, has been attracting particular attention in recent years, and was chosen as the focus of the fourteenth Symposium Aristotelicum, from which this volume is derived.

• Introduction: Michael Frede; Ch. 1 Michael Frede; Ch. 2 David Charles; Ch. 3 Lindsay Judson; Ch. 4 M. Crubellier; Ch. 5 Alan Code; Ch. 6 Enrico Berti; Ch. 7 Andre Laks; Ch. 8 G.E.R. Lloyd; Ch. 9 Jacques Brunschwig; Ch. 10 Aryeh Kosman; Ch. 11 David Sedley; Bibliography; Index.

Michael Frede is Professor of the History of Philosophy at Oxford University, and David Charles is Fellow and Tutor in Philosophy at Oriel College, Oxford.