There is a general consensus that the Fourth Gospel underwent two editions.

But in contrast to all previous efforts to reconstruct these two editions on the basis of source and redaction criticism, Waetjen maintains that these two editions essentially overlap without far-reaching changes.

Chapters 1-20 originated within the Jewish community of Alexandria and were addressed to Jews in order to persuade them to "believe into" Jesus as the Messiah, the Son of God. The second edition originated when chapter 21 as added and certain revisions were made in chapters 1-20 by an editor in the Christian community of Ephesus in order to present the Gospel to Gentile Christians and perhaps attendantly to legitimate it for canonization.

Waetjen examines John's Gospel by engaging in a close reading of various units of the Gospel from the perspective of a two-level drama that presents two narrative worlds within the literary structure of the Gospel.

Out of his readings of the texts, one of the major and provocative conclusions Waetjen draws is that Lazarus is the Beloved Disciple of Jesus in chapters 1-20 while John, the son of Zebedee (and considered by many scholars to be Jesus' Beloved Disciple), is intimated to play that role only in chapter 21, the addendum to the earlier edition of the Gospel.

Waetjen's thorough scholarship and his attention to detail in his original readings challenge traditional readings of John's Gospel, providing fresh insights into the Gospel.