Robert Louis Stevenson 
The Strange Case of Dr. Jekyll and Mr. Hyde [EPUB ebook] 

‚The Strange Case of Dr. Jekyll and Mr. Hyde‘ is a classic tale of the struggle between good and evil. The good Dr. Jekyll is transformed into the evil Mr. Hyde with the drinking of a magic potion. The story is one of the duality that exists within man. In this classic tale of horror, Stevenson suggests that while man is essentially good within us all lurks an evil, violent alter ego that has the potential to destroy us and everything around us.