Carl Schmitt (1888-1985) was a legal theorist, political philosopher, and the author of Legality and Legitimacy, On the Three Types of Juristic Thought, Political Romanticism, Nomos of the Earth, Roman Catholicism and Political Form, Crisis of Parliamentary Democracy, and The Concept of the Political, the last available from the University of Chicago Press.
"Political Theology is about the nature, and thus about the prerogatives, of sovereign political authority in the West.... It is perhaps the piece that best serves as an introduction to Schmitt's thought." - from the Foreword by Tracy B. Strong"