Conversation so far:
who wrote the new testament in the bible
The Pauline letters to churches are the thirteen New Testament books that present Paul the Apostle as their author
what does the new testament discuss
The books in the New Testament teach and testify of the ministry and Atonement of Jesus Christ and the rise of the early Christian Church.
in what language was the new testament written
The New Testament was written in a form of Koine Greek, which was the common language of the Eastern Mediterranean

Question: who wrote the last book
Self-contained rewrite: who wrote the book of revelation