Robert Louis Stevenson (1850–1894) was a Scottish novelist, essayist, and poet whose adventurous spirit and imaginative storytelling made him one of the most beloved writers of the 19th century. Despite lifelong struggles with illness, Stevenson produced enduring classics including Treasure Island, Kidnapped, and The Strange Case of Dr. Jekyll and Mr. Hyde. His work is celebrated for its vivid characters, psychological depth, and mastery of suspense, securing his place as a major figure in English literature.