See this legally free ebook:

  • The Gospel of St. John; With Notes Critical and Explanatory, by the Rev. Joseph MacRory, D.D., Professor of Sacred Scripture and Hebrew, Maynooth College [later Cardinal Archbishop of Armagh and Primate of All Ireland] (Dublin: Browne & Nolan, 1897). With Imprimatur. Available in mobi, epub, and other formats at Project Gutenberg and Internet Archive.

See also the ebooks and texts on the page Bibles and Commentaries, as well as these related ebooks and texts:

On the Feast of Saint John the Apostle and Evangelist in the Roman Rite. For other texts and ebooks, you may access the List of Free eBooks (Arranged by Title), the List of Free eBooks (Grouped by Subject), the List of Worth-It Catholic Books & eBooks, and the main page of the Catholic eBooks Project.

“Many other signs also did Jesus in the sight of his disciples, which are not written in this book. But these are written that you may believe that Jesus is the Christ, the Son of God: and that believing you may have life in his name.” (Gospel according to St. John xx, 30-31)