It's a classic for a reason! If you don't know the story of this gothic novella, The Strange Case of Dr. Jekyll and Mr. Hyde ($7) is narrated by London legal practitioner Gabriel John Utterson, who begins investigating his old friend, Dr. Henry Jekyll, after he begins acting strangely. This story examines the duality of human nature, deals with the impact of substance abuse, and has enough mystery and thrills that even if you know the ending, you'll still love finding your way there.