Philemon:

1 : a friend and probable convert of the apostle Paul. 2 : a letter written by St. Paul to a Christian living in the area of Colossae and included as a book in the New Testament — see Bible Table.

57. Philemon

Paul
A.D. 60
Epistle

Consisting of only one chapter, the book is a short but profound letter from Paul to Philemon requesting forgiveness for a runaway slave named Onesimus.

I included the above here, as I confess I did not even recall that Philemon was a book in the New Testament. One chapter. Certainly I know about Paul.