The Book of James
Jesus' brother, James, was a prominent member of the Jerusalem church. Other names for him were James the Just and Jacob. The letter he composed, now known as the Book of James, was written between 40 and 45 AD and is thought to be the first written document in the New Testament. It is regarded as the New Testament book with the most Jewish substance, and its practical advice is comparable to that of Proverbs.
James became a believer after Jesus' resurrection and accepted Jesus as the Messiah. Initially, James, like his other siblings, did not believe in Jesus' ministry and thought he was crazy. Jame’s conversion is mentioned in 1 Corinthians 15:7.
