‘Benjamin Dahlke's book concisely tells the previously unknown but nevertheless fascinating story of the intensive dialogue between Karl Barth and a rather varied group of German speaking Catholic colleagues. Parts of Barth's most attentive audience, it seems, came from a field that he himself looked upon with a curious mixture of suspicion, disdain and lively interest. Dahlke shows that conversing with Barth or criticizing his theology became one of the most striking phenomena of Catholic theology in search of reform from the 1930s to the 1960s. Dahlke's finely written book is in itself a history of Catholic theology on the way to Vatican II.' - Prof. Dr Leonhard Hell, University of Mainz, Germany