Peter Trawny is Professor of Philosophy at Bergische University, Wuppertal, Germany. He is the co-editor of Heidegger's Gesamtausgabe, or the complete works.Marcia Cavalcante Schuback is Professor of Philosophy at Södertörn University, Sweden. The translator of Heidegger's Being and Time into Portuguese, her books include Praise of Nothingness: Essays on Philosophical Hermeneutics (2006) and The Beginning of God: An Inquiry into Schelling's Late Philosophy (1998).Michael Marder is Ikerbasque Research Professor in the Department of Philosophy at the University of the Basque Country (UPV-EHU), Vitoria-Gasteiz. He is the author of, most recently, Phenomena—Critique—Logos: The Project of Critical Phenomenology (2014); and The Philosopher’s Plant: An Intellectual Herbarium (2014).Martin Heidegger (1889-1976) is regarded as one of the twentieth century's most important philosophers.