I thought Martin Marty's 2004 (reprint 2008) biography of Martin Luther was delightful. I found it readable, quick-paced, thoughtful and brief. I would recommend it for those who have seen the 2004 movie Luther and want an introduction to the Reformation through a biography. Marty is a Lutheran religious scholar who will turn 83 in February 2011. He taught at University of Chicago Divinity School for many years and wrote regularly for The Christian Century from 1956 to 2010.