Reading the Epistles of James, Peter, John & Jude as Scripture Quotes

“The ancient church, of course, provided readers with a whole set of literary clues to indicate clearly that the seven letters of James, Peter, John, and Jude, called “the Catholic Epistles” (hereafter “CE”), should be read together as a distinctive and coherent witness alongside the Pauline corpus.”
― David R. Nienhuis, Reading the Epistles of James, Peter, John & Jude as Scripture: The Shaping and Shape of a Canonical Collection