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

‘The Strange Case of Dr. Jekyll and Mr. Hyde’ by Robert Louis Stevenson explores the duality of human nature through Dr. Jekyll, who creates a potion that transforms him into the malevolent Mr. Hyde. As Hyde becomes more dominant, Jekyll loses control over his creation, leading to tragic consequences. The book reflects on the internal struggle between good and evil within every person.