PhD Dissertation: The Role of the Jewish Feasts in John's Gospel
I was delighted to discover recently, a PhD thesis written by Gerald Wheaton at the University of St. Andrews in 2010. The dissertation was supervised by Kelly Iverson, a great up and coming Markan scholar who is now at Baylor University.
The dissertation is entitled, The Role of the Jewish Feasts in John's Gospel. You can download it here.