The Strange Case of Dr. Jekyll and Mr. Hyde written by Robert Louis Stevenson was published in 1886 and became an instant classic. The novel is about a London lawyer named Gabriel John Utterson who investigates strange occurrences between his old friend, Dr. Henry Jekyll and the evil Mr. Edward Hyde. This new edition of Stevenson's most famous work includes three additional short stories, two short essays, and extracts from contemporary writing on psychological disorders. This science fiction thriller has permeated the English language as the term “Jekyll and Hyde” became synonymous with dual personality. Though the book had initially been published as a “shilling shocker', The Strange Case of Dr. Jekyll and Mr. Hyde brought an immediate success and became one of Stevenson's best-selling works.