The Baker Book House Blog, run by Louis, always provides interesting articles/posts that concern all of Christianity. He recently posted an article called What Was in the “Canon” of the First Four Centuries? It is definitely worth a look, particularly the fascinating quotes from the various Protestant authors he cites.
And if you didn't know, Baker Book House is a wonderful Christian bookstore that is located in Grand Rapids. I have ordered from them in the past, but plan to stop by in person one of these days when life is less hectic.