To bring within the compass of a Modern Library volume the essence of Aristotle’s thought is an achievement of which the editors are pardonably proud. A book for students and general readers alike, this volume provides in its almost 700 pages the Posterior Analytics (Logic), De Anima (On the Soul), Nicomachean Ethics, and Poetics, complete and unabridged, as well as generous selections from Physics, Metaphysics, and Politics. The interpretive introductions by Richard McKeon are helpful guides through the ever-new world of Aristotle’s ideas.