Published in 1886, Strange Case of Dr Jekyll and Mr Hyde is one of the most defining books of the gothic horror genre. Dr. Henry Jekyll is a kind and well-respected scientist in London who believes the human personality has both good and evil sides. He begins to meddle with the darker side of science and invents a serum of a drug that is. supposed to bring out his second nature. He tests the drug on himself successfully, getting transformed into his evil self, Edward Hyde. The latter begins to commit horrible crimes. However, Hyde never repents or accepts responsibility for his evil deeds. Jekyll tries to control his alter ego at the beginning. Hyde takes over near the end, resulting in their deaths.