The book investigates the complex relationship between theology and religion, particularly through the lenses of Dietrich Bonhoeffer and Karl Barth. Greggs explores how these two influential theologians grappled with the nature of faith, the role of the church, and the challenges of living out Christian principles in the modern world. The work examines their theological frameworks, highlighting points of convergence and divergence in their understanding of God's action in history and the human response to divine revelation.

This work is likely to be of significant interest to scholars and students of systematic theology and the history of Christian thought. The focus on Bonhoeffer and Barth suggests a rigorous academic approach, engaging with complex theological arguments and historical contexts. The book's premise of 'theology against religion' points to a critical examination of institutionalized faith and a potential reassertion of authentic theological engagement. It is expected to offer nuanced insights into the ongoing dialogue surrounding the nature of belief and practice in the modern era.