how many books of the bible did the apostle john write
John the Apostle Church tradition has held that John is the author of the Gospel of John and four other books of the New Testament — the three Epistles of John and the Book of Revelation. In the Gospel, authorship is internally credited to the "disciple whom Jesus loved" (ὁ μαθητὴς ὃν ἠγάπα ὁ Ἰησοῦς, o mathētēs on ēgapa o Iēsous) in John 20:2. John 21:24 claims that the Gospel of John is based on the written testimony of the "Beloved Disciple". The authorship of some Johannine literature has been debated since about the year 200.[2][3] Some[by whom?] doubt that the "Gospel of John" was even written by an individual named "John" (Ἰωάννης or יוחנן). Nevertheless, the notion of "John the Evangelist" exists, and is still considered by some the same as the Apostle John.