Strange Case of Dr. Jekyll and Mr. Hyde
by Robert Louis Stevenson
Analysis: What’s Up With the Title?
The novel concerns the strange doings of Dr. Jekyll and Mr. Hyde, who, we find out, are one and the same. Mr. Hyde just happens to be the terrible, evil, criminal side of Dr. Jekyll who is unleashed via mysterious potions. The two men embody "man’s dual nature," hence the dual nature of the title.