As John Lange

Between 1966 and1972 Michael Crichton published eigtht novels under the pseudonym John Lange.

 
             

Within months of being published, Binary (1972) would be made into a movie under the title of Pursuit (1972).
Easy Go (1968) would be republished under the title The Last Tomb in 1974.
Zero Cool (1969) was published with new material by Michael Crichton in 2008, shortly before his death.
All Eight John Lange Novels were published as paperbacks on October 29, 2013, now with "Michael Crichton writing as...". Note how the Zero Cool edition is the same as the 2008 John Lange edition, just with the author´s name amended.