This book should be in every epistemologist's "Must Read" pile. Sutton defends an unorthodox account of justified belief according to which a belief is justified iff that belief amounts to knowledge. He defends (successfully, I'd say) the view from a variety of internalist criticisms and does a better job incorporating genuine internalist insights into his treatment of justified belief than competing externalist accounts manage to do (Here, I have in mind various forms of reliabilism or proper functionalism). There's no denying that his account of justification, his treatment of testimony, or solution to the Preface Paradox are unorthodox, but I think that even those who can't bring themselves to accept the conclusions of the book will admit that his work serves as a much needed corrective in that it scrutinizes a number of assumptions largely taken for granted in the current literature.