Comparison: Mary Reilly and The Strange Case of Dr. Jekyll and Mr. Hyde The book Mary Reilly is the sequel to the famous The Strange Case of Dr. Jekyll and Mr. Hyde. The Strange Case of Dr. Jekyll and Mr. Hyde by Robert Louis Stevenson, is a stark, ingeniously woven, engaging novel. That tells the disturbing tale of the dual personality of Dr. Jekyll, a physician. A generous and philanthropic man, his is preoccupied with the problems of good and evil and with the possibility of separating them into two distinct personalities. He develops a drug that transforms him into the demonic Mr. Hyde, in whos