Jude authored his letter in Palestine, completing it about 65 A.D. The Epistle of Jude, often shortened to Jude, is the second to last book of the New Testament and the Bible as a whole and is traditionally attributed to Jude, the servant and half brother of Jesus and the brother of James. Jude wrote to expose the gross sin of the ungodly intruders of his day.
The Introduction to the Epistle of Jude
Jude himself valued the Word of God and saw it as beneficial for warning fellow Christians in his day. He also used God's Word to exhort, encourage, instruct, and rebuking, advise, and counsel “those who are the called, beloved in God.”