Magnus’s Latin invocation on page 237 that raises Azazel, beginning “Quod tumeraris: per Jehovam, Gehennam,” is taken from The Tragical History of Doctor Faustus by Christopher Marlowe.
The snippets of the ballad Magnus listens to in the car on pages 391–393 are taken with permission from “Alack, for I Can Get No Play” by Elka Cloke. elkacloke.com
The T-shirt CLEARLY I HAVE MADE SOME BAD DECISIONS is inspired by my friend Jeph Jacques’s comic at questionable content.net. The T-shirts can be purchased at topatoco.com. The idea of Magical Love Gentleman also belongs to him.