the volume is an especially valuable epistemological resource: it ushers us toward a deeper understanding of Williamson's epistemology. Here in a single volume are interesting new criticisms of Williamson's views, leveled by some epistemological heavyweights, and novel defenses of those views, defenses in which Williamson often supplements and further develops his earlier contributions. His pioneering work occupies an important place in epistemology, and this volume is a rich and welcome aid to those of us who have an interest in understanding and appreciating Williamson's work. * Tim Black, Notre Dame Philosophical Reviews * The volume appears suitable for an audience of (mainly postgraduate) students and scholars of philosophy who are already familiar with Williamson's knowledge-first epistemology but look for clarifications, further explanations, or aim at a critical assessment of it in the light of more recent philosophical reflection. The book turns out to be a very valuable tool with respect to these aims. ... intreguing and valuable. * Luca Moretti, Mind *