Urban Nightmares

Folklore in the past has given body to ghosts, ghouls, vampires, werewolves, and other sinister creations of human fears and imagination. Modern urban folklore provides a host of new menaces, and these terrors are now lurking in distant European castles, but are waiting for readers down the block, in the office elevator, under the concrete of their street. Is that only air clanging in the plumbing or is some thing coming up from the dark depths of the city and into readers' personal urban nightmare?