Paul wrote 13 epistles and not 21 epistles in the new testament.
There are no books called "letters" (or epistles) in the Hebrew Old Testament. All books that are designated as "letters" are Greek, and found in the New Testament.
There are three types of books in the New Testament. They are the Historical Books, Pauline Epistles, and General Epistles
The books of the Bible are divided into two main sections: the Old Testament and the New Testament. The Old Testament contains books that were written before the birth of Jesus, while the New Testament contains books that were written after his birth. Each section is further divided into different books, such as the Gospels, Epistles, and Prophets.
The books in the Bible are divided into two main categories: the Old Testament and the New Testament. The Old Testament contains books that were written before the birth of Jesus, while the New Testament contains books that were written after his birth. Each Testament is further divided into different sections, such as the Pentateuch, Historical Books, Wisdom Literature, Prophets in the Old Testament, and the Gospels, Acts, Epistles, and Revelation in the New Testament.
Paul wrote 14 books of the Bible, starting with Romans and continuing through Hebrews.
Matthew, Mark, Luke, John, and Acts. Revelation is a prophetic book and all the others are letters or epistles.
There are no books of Poetry in the New Testament
There are 27 books in the new testament/christian testament
The Bible does not have a 2nd and 3rd book of John, but there are three short epistles ascribed to John in the New Testament: 1 John, 2 John, and 3 John. These books are located towards the end of the New Testament, after the Gospel of John.
All that are not the Four Gospels, Acts, and Revelation.
Paul's two Epistles to the Thessalonians (1 and 2) are in the New Testament.
The term used is 'epistles'.