The Apostle Paul is credited with writing 13 of the books in the New Testament. His writings make up more of the entire New Testament than any other author.
Paul the Apostle, considered one of the most influential people in the spread of Christianity, wrote approximately half of the books found in the New Testament. These include the books of Romans, 1 Corinthians, 2 Corinthians, Galatians, Ephesians, Philippians, Colossians, 1 Thessalonians, 2 Thessalonians, 1 Timothy, 2 Timothy, Titus and Philemon. Many scholars throughout history, such as Thomas Aquinas and John Owen, also state that Paul is the author of the book of Hebrews, but this position is frequently disputed.