It's titled "Black Tulip" by Erik Schmidt. It's not just another bio, but supposedly, an in-depth look at the man and his relationship with his culture at the time. Schmidt, and American of German descent, says he was "not trying to praise Hartmann, nor to bury him" but rather capture a more complex picture of the man an his relationship to nazi-ism and his other, personal relationships. It's an interesting concept and I've always wondered about this area of his life. Has anybody read this and if so, what's your take on the book?