Thirteen of these Epistles were written by the apostle Paul: Romans, 1 and 2 Corinthians, Galatians, Ephesians, Philippians, Colossians, 1 and 2 Thessalonians, 1 and 2 Timothy, Titus, and Philemon. Within this group of Pauline Epistles is a subgroup labeled the Prison Epistles (Ephesians, Philippians, Colossians, and Philemon) so-called because they were written during Paul’s two-year house arrest in Rome (Acts 28:30–31). The Pastoral Epistles (1 and 2 Timothy and Titus) were written to church leaders and include many teachings regarding practices within the early church.Following these writings are eight General Epistles (sometimes called Catholic Epistles, since they were written to a “universal” audience) that include Hebrews, James, 1 and 2 Peter, 1, 2, and 3 John, and Jude. The author of Hebrews is unknown (though many have historically attributed it to Paul or one of Paul’s associates). James was one of the earliest New Testament writings and was written by James, the half-brother of Jesus (1 Corinthians 15:7). The apostle Peter wrote 1 and 2 Peter. The apostle John (the same author of the Gospel of John and Revelation) wrote 1 John, 2 John, and 3 John. The short Epistle of Jude was written by Jude, another half-brother of Jesus (Jude 1:1).
All of the known authors of the Epistles are either an apostle (Paul, Peter, John) or a family member of Jesus (James, Jude). Each of these individuals had a unique calling from the Lord Jesus that included writing letters to others. These letters, inspired by the Holy Spirit, are preserved as part of the New Testament’s writings today.