St. Francis de Sales was amazing. The love and patience he showed towards the Protestants in Geneva is beyond human capabilities. He was definitely a man of God, and the contrast between his ways and the ways of Luther and Calvins are stark.
Lisa, a great book about the Reformation is The Roots of the Reformation by Karl Adam. He is a Catholic writer yet incredibly fair in his treatment of Luther. I believe it is available in hard copy in the CHN store, although I got mine for Kindle from Amazon. It’s a great read.