it's one of three books that's kicking off a series of such books from princeton university press. and to start our discussion, i want to read the press' description of what they're trying to do and then ask dr. marty to comment on it. they say that this new series recounting the complex and fascinating histories of important religious texts written for general readers by leading authors and experts is intended to trace how their reception, interpretation and influence have changed over time. often radically. as these stories remind us, all great religious books are living things whose careers in the world can take the most unexpected turns. now, dr. marty, you've also recently completed and published a biography of martin luther, a lutheran who somewhat predated dietrich bonhoeffer. [laughter] what's the difference between with writing a biography of a figure like luther and be -- and a book like bonhoeffer's? >> there are far more similarities than i thought i would find. when princeton university press described this series and asked me if i would be a kicker offer of it, it too