The New Testament was written in everyday style of Greek. Jesus’ oral teaching was in Aramaic.
In New Testament times the “letter” was a popular form of communication.
One great motive for New Testament writing was to preserve the record for teaching—not to write a history.
Luke is the only New Testament writer who evinced anything like an interest in history.
Another motive for writing was to make converts—evangelization.
Still a third motive was “edification” of believers.
In the case of Paul, much of his writing was to combat “errors” and settle disputes.
Early New Testament writings were on papyrus. Later on parchment.
The arrangement of the New Testament is not chronological. Gospels come first, followed by Acts and Paul’s letters to the churches. Then the remainder, followed by Revelation.