The Cost of Discipleship is one of the bestselling titles on the SCM Classics list and one of the classics of modern theology. Perhaps Dietrich Bonhoeffer’s most radical book, this reading of the Sermon on the Mount has influenced many Christians throughout the world over the last 50 years.50 years after its first publication, the book is reintroduced to readers of our time by Stephen Plant, Dean of Trinity Hall, Cambridge and one of the leading Bonhoeffer scholars of our time.