There are 21 letters, mostly by Paul, John and Peter.
The 6 books of the New Testament that are not letters include: Matthew, Mark, Luke, John, Acts, and Revelation.
Matthew, Mark, Luke, John, Acts, and Revelation are the books that are not letters/epistles in the New Testament.
Matthew, Luke, Mark and John
21
21
Five books of the New Testament have been attributed to John the Apostle: the Gospel, three Epistles ( letters ) and Revelation.
there are 5
There are four books named after John in the New Testament. John First John Second John Third John
There are books in the Old Testament, letters are in the New Testament.
The new testament
The letters found in the New Testament are also known as the Epistles.