Let's be realistic: secondary sources are hit or miss, but mostly miss. I knew I was taking a chance on this one, wondering if I was going to even bother finishing it. Admittedly there are a few chapters (essays) at the beginning which are preliminary introductions to the general topic, and these did not especially inform me of the over-all value of this volume. But the more I read the more I fell in love with this book! As one who has extensively studied Marx, Nietzsche, Adorno, Lukacs, Merleau-Ponty, Bergson, Foucault, Kristeva, Deleuze, etc., let me say definitely that this volume is completely essential to my studies, and it is an inspiring and goal-orienting volume at that. I hope to work through the rest of this series from the International Library of Phenomenology and Moral Sciences.