The book is a guide to the Gospel of John, in which the text of this Gospel is examined from a historical and theological perspective. The Gospel of John differs significantly from the three synoptic ones - from Matthew, Mark and Luke. This encourages us to consider the Gospel of John as an independent source of information about the life and teaching of Jesus Christ, significantly complementing the other three Gospels. The Gospel of John is essentially a theological treatise in which events from the life of Jesus are given selectively, but each event is placed in the context of one or another a different theological concept and clearly illustrates this concept. The book pays constant attention to the parallels between the stories of John and the stories of the other Evangelists. The publishing layout is preserved in PDF A4 format.