From comiclist, August 29, 2013, “Andy Friedman to draw variant cover for Harbinger #19″
— includes a very brief interview with Mr. Hat, uh, I mean Mr. Friedman.
Link to Mr. Friedman’s website here.
And…
From The Comics Reporter, August 29, 2013, “Festivals Extra: CAB to Feature City of Glass Panel with Karasik, Mazzucchelli, Auster & Spiegelman”
Link to Paul Karasik’s blog here.
Link to Art Spiegelman’s Wikipedia entry here.