The thirteenth, and last, of Paul's Epistles, and the eighteenth book in the New Testament, is Philemon. It was written around 62 AD whilst Paul was imprisoned in Rome.
The letter is addressed to Philemon, an old friend of Paul's who he had converted during his time at Colosse. A runaway slave had made his way to Rome, and by chance, or God's design, the slave belonged to Philemon. Paul had converted the slave to Christianity but, wishing to obey Roman law, Paul sent him back to his master. The letter asks Philemon to forgive the absconder and to receive him back as a brother in Christ.