I've been reading David Riggs' book The World of Christopher Marlowe. I find it fascinating though I can't quite put my finger, yet, on what the biographer's agenda is. He certainly has one. And, despite or because of all his research, I have no clear picture of Marlowe at all.
Marlowe's Doctor Faustus: From scene 1:
Ay, we must die an everlasting death.
What doctrine call you this, Che sera sera,
"What will be shall be?" Divinity, adieu