Emmanuel Faye's book is a scandal - not for its revelations it contains about Heidegger's seminars at Freiburg in the early 1930s, but for the "philosophical" analysis that it subjects them to. In reality, this is a work of juvenile polemic, in which Faye dissimulates his underlying philosophical disagreement (with Heidegger's critique of Cartesian humanisim) and, content to avoid engaging the thinker on any substantive level, instead rains down endless accusations of racism, fascism, and anti-Semitism. The puerility and intellectual cowardice of this technique in fact blunts the legitimate elements of Faye's criticism.
Faye's understanding of Heidegger's philosophy is relentlessly simplistic, and the structure of his approach contains an inherent bias. No real appraisal of Heidegger's thinking and its possible affinities with fascism can be undertaken on the basis of his writings from 1933-5 alone. Still, this is what Faye does. Without giving any detailed consideration to works such as Being and Time, Introduction to Metaphysics, or the Nietzsche lecture courses - recognized almost universally as the core of Heidegger's oeuvre - Faye feels confident in making pronouncements that smack of fanatical extremism, going so far as to suggest that the publication in Germany of Heidegger's Gesamtausgabe be halted.
For some, this book will be worth buying simply for the citations it includes of various important unpublished seminars and documents (e.g. Heidegger's 1933 letter to Carl Schmitt). To Faye's credit, he footnotes the original German text when he cites unpublished sources; this is thoughtful of him, since his French translations are often extremely biased or just plain inaccurate.
All in all, a disgrace to scholarship - and nothing at all to philosophy.