The Slenderman Mysteries: An Internet Urban Legend Comes to Life

It's the dead of night; you are fast asleep. Suddenly, you are wide awake but unable to move. Hunched over you in the shadows is an eight- or nine-foot-tall gaunt entity with spider-thin limbs, dressed in an old-style black suit, its pale face missing eyes, nose, ears, and mouth. You finally manage to cry out. The monstrous thing disappears as suddenly as it appeared.

You just had a terrifying encounter with the Slenderman.

Who—or what—is the Slenderman? His existence began on the Internet, b...