The best book-length treatment of Heidegger with which I am familiar. . . . What Guignon does, very skillfully, is to use the problem of knowledge as a focus for organizing a discussion of Heidegger's thought in its entirety. . . . Places him squarely within the philosophical tradition he struggled to overcome and provides an account of his development from Being and Time to the last writings, which make the changes in his thought continuous and intelligible." --Harrison Hall, Inquiry