interview classic-exceptional Dietrich Bonhoeffer biography

One of my personal heroes and a giant of the 20th century was martyred theologian, pastor and underground seminary teacher Dietrich Bonhoeffer. His influence on Christians in the second half of the 20th century has carried to a new generation of fellow believers who answer his call against "cheap grace" that offers heaven without a cross, repentance, and spiritual rebirth. This  2011 biography is masterful and worth your attention.