From X.com to X Corp., the letter X holds "great sentimental value" to billionaire Elon Musk, ... to pay your rent, to book appointments with your doctor and even to pay fines," said Vance.

Davey Davis’s new novel, “X,” is a queer noir set in a near-future world full of inexplicable violence, “exported” undesirables and an encyclopedia’s worth of sexual deviance.