I have a personal hero in the person of Dietrich Bonhoeffer. I was excited to see the new book about his life by Eric Metaxas titled Bonhoeffer: Pastor, Martyr, Prophet, Spy and especially since it was available on Audible for download. I was pleasantly surprised by the unabashedly Christian reading of it.
A definitive biography, but huge tome of Dietrich Bonhoeffer was written by Eberhard Bethge, one of Bonhoeffer's Seminary students and his best friend. Other wonderful books by relatives and people who knew Bonhoeffer give other views of his life. And Bonhoeffer was quite a writer, so reconstructing his thoughts with his actions and put into a timeline can be accomplished with much study. Eric Metaxas has done just that and given us a very readable and listenable biography of the great Christian thinker, filled with detail, but with a nice pace so as to allow for flow.
