This book provides a systematic reading of Martin Heidegger's project of "fundamental ontology," which he initially presented in Being and Time (1927) and developed further in his work on Kant. It shows our understanding of being to be that of a small set of a priori, temporally inflected, "categorial" forms that articulate what, how, and whether things can be. As selves bound to and bounded by the world within which we seek to answer...