This authoritative book offers challenging yet accessible accounts of the major features of Barth's theological work, especially as it has become available through the publication of his collected works, and interacts with the best of contemporary Barth scholarship. It assesses Barth's significance for contemporary constructive theology, and his place in the history of twentieth-century Christian thought. The Companion both sums up and extends recent renewed interest in Barth's theology, especially in English-speaking theology, and shows him to be once again a major voice in constructive theology.