I have read numerous books on Bonhoeffer. I have also seen documentaries and dramatizations and visited commemorative sites in Germany. For me, one of Marsh’s greatest contributions is putting on display the quirky humanity of his subject. If you are used to accounts that emphasize the mythic Bonhoeffer of faith, this one will help you grapple with the eccentric Bonhoeffer of history.
To take a trivial example, Bonhoeffer was endearingly preoccupied with dressing well. You could illustrate almost every momentous turning point in his life with sartorial commentary. When he takes a pastoral internship in Spain, he bombards the senior minister with written inquiries regarding the proper formal wear for dinner parties. The poor, overworked man eventually remarked sarcastically that the new intern should bring his preaching robe.