Desert island Autodidactus" inspired Robert Boyle, an acquaintance of Pococke, to write his own philosophical novel set on a deserted island, "The Aspiring Naturalist". Ibn al-Nafis' "Theologus Autodidactus" was also eventually translated into English in the early 20th century. Published in 1719, Daniel Defoe's novel "Robinson Crusoe" about a castaway on a desert island has spawned so many imitations in film, television and radio that its name was used to define a genre, Robinsonade. The novel features Man Friday, Crusoe's personal assistant. It is likely that Defoe took inspiration for Crusoe from a Scottish sailor named Alexander Selkirk, who was rescued in
The Island at the Top of the World four friends move further and further away until they vanish into the Arctic mist. The film's pre-production lasted for several years. The 30th Anniversary Edition of the film, released by Walt Disney Studios Home Entertainment in 2004, includes a "1968 Pre-Production Trailer" as a bonus feature, which includes an interview with producer Winston Hibler. The film was based on the novel "The Lost Ones", written by Ian Cameron, set in the location of Prince Patrick Island. To tie in with the film, the novel was reissued with the movie's title. There were several changes from the book to the film.