Dietrich Bonhoeffer was just thirty-nine years old when he was executed by the Nazis in 1945, yet his influence on Christian theology and life has been enormous. "A testment to freedom" takes readers along a biographical-historical journey that follows Bonhoeffer through the various stages of his life and career, including his final years in the underground resistance against the Nazi government and his subsequent martyrdom. This book features previously untranslated writings, sermons, and selections from his letters spanning his entire pastoral-theological career, including his prison letters.