The Lost World is a 1995 techno-thriller novel written by Michael Crichton, and the sequel to his 1990 novel . It is his tenth novel under his own name and his twentieth overall, and it was published by Knopf. A paperback edition (ISBN 0-345-40288-X) followed in 1996. In 1997, both novels were re-published as a single book titled Michael Crichton's Jurassic World, which is unrelated to the 2015 film of the same name.