This book contains a full textcritical apparatus with conclusions on the Gospel of John. The Greek text in all its variety stands at its base and it is then compared with a great number of textual witnesses: Syriac, Latin, Coptic, Armenian, Georgian, Ethiopian, Dutch and also with Palestinian, Georgian and Dutch Lectionaries and the Diatessaron in all its variety. These last categories are often neglected in textcritical research, but they appear to be an outstanding textual witness to the early textforms of the Gospel. Also some early fathers, Origen and Ephrem, are included . This book is thus a contribution to the International Greek New Testament-Project, as it enlarges its scope to a wider range of textual witnesses.