The Barthian Scholars

George Hunsinger (Hazel Thompson McCord Professor of Systematic Theology, Princeton Theological Seminary) 
How to Read Karl Barth. The Shape of his Theology (OUP, 1991)
Disruptive Grace: Studies in the Theology of Karl Barth (Wm. B. Eerdmans, 2001)
For the Sake of the World: Karl Barth and the Future of Ecclesial History (Wm. B. Eerdmans, 2004)

From 1997-2001 he was Director of the Center for Barth Studies.
Series Editor of Ashgate's Barth Studies.

Bruce McCormack (Frederick and Margaret L. Weyerhaeusar Professor of Systematic Theology, Princeton Theological Seminary)
Karl Barth's Critically Realistic Dialectical Theology: Its Genesis and Development 1909-1936 (OUP, 1995)
Orthodox and Modern: Studies in the Theology of Karl Barth (Eerdmans, 2008)

John Webster (Professor of Systematic Theology, Aberdeen)
Barth's Ethics of Reconciliation (CUP, 1995)
Barth's Moral Theology (T & T Clark, 1998)
The Cambridge Companion to Karl Barth (CUP, 2000)
Karl Barth. Outstanding Christian Thinkers (Continuum, 2000, 2004)
Barth's Earlier Theology (2005)

Series Editor of Ashgate's Barth Studies.

Colin Gunton (formerly Professor of Christian Doctrine, King's College London)
Becoming and Being (SCM, 1978, 2001)
'Preface' in Karl Barth, Dogmatics in Outline (SCM, 2001)
'Introduction' in Karl Barth, Protestant Theology in the Nineteenth Century (SCM, 2001)
The Barth Lectures (T & T Clark, 2007)

Robert Jenson
Alpha and Omega: A Study in the Theology of Karl Barth (1963)
God After God (1969)

Thomas Torrance (formerly Professor of Christian Dogmatics, Edinburgh)
Karl Barth: An Introduction to the Early Theology 1910-1931 (1962)
Karl Barth: Biblical and Evangelical Theologian (T & T Clark, 1990)

Editor of the English Translation of the Church Dogmatics (1957-1975)

Nigel Biggar (Regius Professor of Moral and Pastoral Theology, Oxford)
(ed.) Reckoning with Barth: Essays in Commemoration of the 100th Anniversary of the birth of Karl Barth (1988)
The Hastening the Waits: Karl Barth's Ethics (1993, 1995)
'Barth's Trinitarian Ethic' in The Cambridge Companion to Karl Barth (2000)
'Barth's Trinitarian Ethic Revisited' (forthcoming)