The Gospel according to John is one of the four canonical gospels contained in the New Testament of the Christian Bible.

Written in Greek, it consists of 21 chapters and, like the other gospels, narrates the ministry of Jesus. The Gospel according to John differs significantly from the other three gospels, known as the Synoptics, although it seems to presuppose knowledge of at least the Gospel according to Mark, from which it sometimes reproduces peculiar expressions. While the Synoptics are based on Jesus' preaching of the Kingdom of God, the Fourth Gospel goes deeper into the question of Christ's identity.

(From Italian Wikipedia)