Epistle of Jude in Wikipedia

The Epistle of Jude, usually referred to simply as Jude, is the penultimate book of the New Testament and is attributed to Jude, the brother of James the Just (who was called "the brother of Jesus"). The letter of Jude was one of the disputed books of the Canon. Although its canonical status was contested, its authenticity was never doubted by the Early Church. The links between the Epistle and 2 Peter, its use of the Apocryphal Books, and its brevity raised concern...

Link: https://en.wikipedia.org/wiki/Book_of_Jude