The name of the shadow (джен)

If only he could sleep or die for a moment, if only the City stopped crying into Alec’s ear, for just a second… But sleep had left him, he was so tired that he couldn’t sleep, so past that point where he would just crash down on the spot. His field of vision had narrowed but everything in it stayed overly sharp, like on a painting of a madman.
A soft tap on wood made him jerk his head and look at the entrance.
There was a shadow there.