It's often difficult to get beyond the blind fury of Belloc's chip-on-the-shoulder brand of Catholicism. Dante-like Belloc stops just short of consigning several of these historical figures to the flames of eternal perdition for severing his beloved England from the Catholic Church, thereby depriving his countrymen, it would seem, from attaining the beatific vision. Belloc's axe is just too big here to enjoy much of the grinding.
I found this an interesting break down of all the key figures from the Protestant Reformation. Belloc's explanations are clear and accessible, if a bit biased. I started reading this book when I was teaching A Man for All Seasons, and this would be a good resource for explanations regarding those characters. The thing that bothered me the most was the lack of sources. I know Belloc was writing in a different time, but I really wanted to know where some of his information came from.
History in bite-size chunks. Of course, now I want to read full-size biographies of at least half of these people, so I suppose it's a good thing, right?