The Lost World: Jurassic Park
From The Arthur Conan Doyle Encyclopedia
The Lost World: Jurassic Park is an American movie produced by Universal Pictures & Amblin Entertainment released on 19 may 1997 (USA). 128 minutes. This is the sequel of the Jurassic Park movie (1993).
The movie is an adaptation of the Michal Crichton's novel The Lost World (1995) but it's not an adaptation of the original Conan Doyle's The Lost World (1912).
As the Crichton's novel has the same title than the Conan Doyle's story, the studio feared that the public might confuse it with the Sir Arthur Conan Doyle classic (the title and many plot elements were indeed deliberate references by Michael Crichton but the story is different), and originally considered naming the film "The Lost Island". In the end, the novel's title was kept, but "Jurassic Park" was appended to solidify the sequel connection.
In a 1997 interview with Bill Warren for Starlog Press' Dinosaur magazine, Crichton said: « It's a reference to Conan Doyle, one of his more pulpy stories. It's a Professor Challenger story, and it's actually not a very good book, but it's a wonderful title, and it's about an expedition to a place where there are dinosaurs. »
This comment was ironic considering that, opinions aside, Conan Doyle's novel - whose title Crichton "borrowed" and capitalized upon to promote his sequel - is the eponymous work of an entire literary sub-genre it helped to found. Conan Doyle's novel is wonderfully creative, full of wry comedy, beautiful description, and fantastic adventure, and it is a shame Crichton would make such a comment about a work to which he owed so much." 
- Don Swanbeck (Quincy, Massachusetts, USA).