The Lost World is a techno thriller novel written by Michael Crichton and published in 1995 by Knopf. A paperback edition (ISBN 0-345-40288-X) followed in 1996. It is a sequel to his earlier novel Jurassic Park. In 1997, both novels were re-published as a single book titled Michael Crichton's Jurassic World, unrelated to the film of the same name.