Sosa's book is admirable in its insistence that externalism is consistent with epistemic credit, and in its refusal to get bogged down in intuition slinging. Moreover, there are rich discussions of several topics, in particular the epistemic status of dreams and the force of intuitions in philosophy.

Adam Morton Mind Vol 118 Oct 2009

If you are interested enough in epistemology to be reading this review, then you must read the marvelous book being reviewed...While many bits and pieces of Sosa's work are already well known to everyone working in epistemology, they are known primarily through various papers that Sosa has written, and it is not generally well understood just how the views put forward in those many papers fit together to form a coherent and explanatorily powerful epistemology. Reading this book helps one to understand that.

Ram Neta, Notre Dame Philosophical Reviews