John Painter, “John 9 and the Interpretation of the Fourth Gospel,” Journal for
the Study of the New Testament 28 (1986) 31–61.
More challenging:
J. Louis Martyn, “Glimpses into the History of the Johannine Community,” in History and Theology in the Fourth Gospel (3rd ed. Louisville: Westminster John Knox, 2003) 145-167.
“The Question of Suffering”, by Michal Beth Dinkler