In the past months, I've mentioned Diarmaid MacCulloch's book The Reformation: A History a few times.
Tonight, I finally finished it. Here's a list of posts where I mentioned the book in more than passing:
The book is around 700 pages of narrative prose. It took me about five months to get through, though it did sit untouched for weeks at a time while I focused on other things.
All in all, I'd recommend it. Some places were dry, other places were (I thought) unnecessary; but as a whole the book is worth reading. Particularly if you have an interest in history and especially if you have an interest in the Reformation.