Question: Were Ken Annakin and Michael Crichton both involved in the film industry?

Context articles: The Lost World (Crichton novel)
The 13th Warrior
The Andromeda Strain
Timeline (video game)
Grave Descend
Binary (novel)
Michael Crichton
Ken Annakin
Jurassic Park (novel)
The Story of Robin Hood and His Merrie Men

The Lost World is a techno thriller novel written by Michael Crichton and published in 1995 by Knopf.
 A paperback edition (ISBN  ) 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 2015 film of the same name.
The 13th Warrior is a 1999 American historical fiction action film based on the novel "Eaters of the Dead" by Michael Crichton and is a loose retelling of the tale of Beowulf.
 It stars Antonio Banderas as Ahmad ibn Fadlan, Diane Venora, and Omar Sharif.
 It was directed by John McTiernan.
 Crichton directed some reshoots uncredited.
 The film was produced by McTiernan, Crichton, and Ned Dowd, with Andrew G. Vajna and Ethan Dubrow as executive producers.
The Andromeda Strain is a 1969 techno-thriller novel by Michael Crichton documenting the efforts of a team of scientists investigating the outbreak of a deadly extraterrestrial microorganism in Arizona.
 "The Andromeda Strain" appeared in the "New York Times" Best Seller list, establishing Michael Crichton as a genre writer.
Timeline is a 2000 adventure/puzzle video game published by Eidos Interactive for the personal computer.
 The game was developed by author Michael Crichton's Timeline Computer Entertainment (initially formed as Timeline Studios), and is based on Crichton's 1999 novel of the same name.
 Crichton was directly involved in the game's creation.
Grave Descend is a novel written by Michael Crichton under the pseudonym John Lange.
 It was originally published in 1970, and later re-released in 2006 as part of the Hard Case Crime series.
 For this release, Michael Crichton did an overall revision of the text.
 The novel was nominated for the Edgar Award in 1971.
 Hard Case Crime will republish the novel under Crichton's name on October 29, 2013.
Binary is a techno-thriller novel written by Michael Crichton in 1972 under the pen-name John Lange.
 Crichton also directed "Pursuit", a television film version.
 The story of both the book and the film revolve around a deadly nerve agent composed by combining two different chemicals.
 Hard Case Crime republished the novel under Crichton's name in 2013.
John Michael Crichton ( ; October 23, 1942 – November 4, 2008) was an American best-selling author, screenwriter, film director and producer best known for his work in the science fiction, medical fiction and thriller genres.
 His books have sold over 200 million copies worldwide, and many have been adapted into films.
Kenneth Cooper "Ken" Annakin, OBE (10 August 1914 – 22 April 2009) was a prolific English film director.
Jurassic Park is a 1990 science fiction novel written by Michael Crichton, divided into seven sections (iterations).
 A cautionary tale about genetic engineering, it presents the collapse of an amusement park showcasing genetically recreated dinosaurs to illustrate the mathematical concept of chaos theory and its real world implications.
 A sequel titled "The Lost World", also written by Crichton, was published in 1995.
 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.
The Story of Robin Hood and His Merrie Men is a 1952 live action Disney version of the Robin Hood legend made in Technicolor and filmed in Buckinghamshire, England.
 It was written by Lawrence Edward Watkin and directed by Ken Annakin.
 This is the second of Disney's complete live-action films, after "Treasure Island" (1950), and the first of four films Annakin directed for Disney.