Book excerpt: Soren Kierkegaard is one of the prophets of the contemporary age, a man whose acute observations on life in nineteenth-century Copenhagen might have been written yesterday, whose work anticipated fundamental developments in psychoanalysis, philosophy, theology and the critique of mass culture by over a century. John Caputo offers a compelling account of Kierkegaard as a thinker of particular relevance in our postmodern times, who set off a revolution that numbers Martin Heidegger and Karl Barth among its heirs. His conceptions of truth as a self-transforming 'deed' and his haunting account of the 'single individual' seemed to have been written with us especially in mind. Extracts include Kierkegaard's classic reading of the story of Abraham and Isaac, the jolting theory that truth is subjectivity and his ground-breaking analysis of the concept of anxiety.