Satan's Signature: Jekyll and Hyde, the Invisible Man, and Other Mad Scientists

"The man's become inhuman, I tell you," said Kemp. "I am as sure he will establish a reign of terror-so soon as he has got over the emotions of this escape-as I am sure I am talking to you."

Whether creepily eccentric, dangerously ambitious, or downright villainous, the mad scientist has been influential on the horror genre ever since Dr. Victor Frankenstein created his monster. His literary descendants-found in notable works by writers as varied as Robert Louis Stevenson, Jack London, and H...