I’ve been assigned to reseach and write a 10 biographical paper on Martin Luther in a church history that I’m currently taking.  Here are some of the resources that I’ve found helpful (which means that they were already in my library, with the exception of Bainton’s, Here I Stand: A Life of Martin Luther, which I picked up from Amazon for $13 and some change).

Also, these two online issues of Christian History & Biography were great:

• Issue 34, April 1992—Martin Luther: The Reformer’s Early Years
• Issue 39, July 1993—Martin Luther: The Later Years