...an excellent and accessible introduction to the later Heidegger. - "Choice". Heidegger's method is unmistakable in these lectures...This is thinking that is alive, always green. - "Review of Metaphysics". This translation ...enlarges our historical view of the probing advances in Heidegger's thought. - "International Studies in Philosophy". This clear translation of Martin Heidegger's lecture course at the University of Freiburg in the winter semester of 1941, first published in German in 1981 as "Grundbegriffe" (volume 51 of Heidegger's collected works), offers a concise introduction to the new directions of his later thought. In this transition, Heidegger shifts from the problem of the meaning of being to the question of the truth of being.