Who wrote the book of John?
The Gospel of John is anonymous. Traditionally, Christians have identified the author as "the Disciple whom Jesus loved" mentioned in John 21:24, who is understood to be John son of Zebedee, one of Jesus' Twelve Apostles. These identifications, however, are rejected by many modern biblical scholars. Nevertheless, the author of the fourth Gospel is sometimes called John the Evangelist, often out of convenience since the definitive name of the author is still debated.
Why did God give us four Gospels?
Here are some reasons why God gave four Gospels instead of just one:
Who was the disciple whom Jesus loved?
The Gospel of John is the only Gospel which mentions “the disciple whom Jesus loved.” John 13:23 tells us, "One of them, the disciple whom Jesus loved, was reclining next to Him." John 19:26 declares, "When Jesus saw His mother there, and the disciple whom He loved standing nearby, He said to His mother, 'Dear woman, here is your son.'" John 21:7 says, “Then the disciple whom Jesus loved said to Peter, ‘It is the Lord!’” This disciple is never specifically identified, but the identity of the disciple whom Jesus loved is clear. The disciple whom Jesus loved is John, the son of Zebedee and brother of James.