The practical answer to this question is easy: No, new books can't be added to the canon. The technical answer is a bit more involved. I wrote the article What are the Criteria for a Book to be Canonical? on how the church fathers recognized the books in the New Testament canon. It's possible a book "slipped through the cracks" when the church fathers were studying them, although it's not probable.
I'll limit this article to...
This article in my series about the Biblical Canon will be short, although the footnotes are extensive. In the first few hundred years after Jesus's resurrection, the church was trying to understand which books were in the canon. God made the canon, but it was still up to the church to recognize which books were appropriate for use.
Have you ever walked into a crowded room and seen some faces which are vaguely familiar, but you can't remember the...
