For those who are interested, here is an interview with Professor David Clough from earlier this year on the subject of Barth's theological development. It has recently made its way online...alas, the interviewer (me!) has been edited out. The interview was for a new DVD Interactive Multimedia Timeline created by Rev. Dr Tim Hull at St John's College Nottingham. Several high quality scholars agreed to be interviewed, including Dr Karen Kilby, Dr Ben Fulford, Professor Antony Thiselton, Professor David Fergusson, and several others forthcoming.
Ethics in Crisis: Interpreting Barth's Ethics (Aldershot: Ashgate, 2005).