The virtues of this book are many. First and foremost, the possibility of knowledge is a topic which, though addressed by various authors and in various places, has not previously recieved the sort of sustained attention it gets here... a delightful book that is well worth reading. I recommend it especially to those who have thought about how to address how-possible questions in epistemology, and to those who wonder how Kant might be connected to the contemporary literature in epistemology. I can think of few better people with whom to explore these issues than Cassam himself. Sanford Goldberg, Mind