Samuel Lloyd Osbourne (1868-1947) was an American author and the step-son of Scottish author Robert Louis Stevenson. He studied engineering at the University of Edinburgh. With Stevenson he went to Samoa where in 1897 he was appointed vice consul to represent the United States. He co-authored three books with his stepfather and provided input and ideas on others. As a boy, he and his step-father painted a map of an imaginary island, and this quickly formed the inspiration for Stevenson's classic Treasure Island. His works with Robert Louis Stevenson include The Wrong Box (1889), The Wrecker (1892), and The Ebb-Tide (1894). His other works include Love: The Fiddler (1903), The Motormaniacs (1906), Wild Justice (1906), The Adventurer (1907), The Kingdoms of the World (1911), and An Intimate Portrait of RLS (1924).