The Gospel According to Saint John - CCS by Brooke Foss Westcott and published by Classics.
B.F. Westcott’s classic work on the Greek text of the Gospel of John was the fruit of forty years of research, the book having been commissioned around 1860 and published posthumously by his son. The Greek text is that of Westcott and Hort. Readings of select Greek uncial manuscripts are placed beneath the text in the case of textual variants noted in the Introduction, and all the more important readings are treated in special critical notes, which are indexed. As the author himself writes “The Son of God is come and hath given us an understanding that we may know Him that is true, and we are in Him that is true, even in His Son Jesus Christ” and this is the author's aim in writing this book.