Question: Drug of Choice is a novel written by John Michael Crichton under the pseudonym John Lange, was originally published in which year, Crichton 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?

Context paragraphs:
Easy Go: Easy Go is Michael Crichton's third published novel.  It was released in 1968 under the pseudonym of John Lange.  Re-released in 1974 by Bantam Books as The Last Tomb.  Hard Case Crime republished the novel under Crichton's name on October 29, 2013.

Drug of Choice: Drug of Choice is a novel written by Michael Crichton under the pseudonym John Lange.  It was originally published in 1970.  Hard Case Crime republished the novel under Crichton's name in November 2013.

Grave Descend: 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.

Zero Cool: Zero Cool is Michael Crichton's fifth published novel.  It was released in 1969 under the pseudonym of John Lange, and later re-released in 2008 as part of the Hard Case Crime series.  For this release, Crichton wrote short new framing chapters, in addition to doing an overall revision of the text.  Hard Case Crime will republish the novel under Crichton's name on November 19, 2013.

Pursuit (1972 TV film): Pursuit is a 1972 television film that screened on the ABC network.  It was a TV Movie of the Week and marked Michael Crichton's directorial debut.  It is based on Crichton's 1972 novel "Binary", which he published under the pseudonym John Lange.

Jurassic Park (novel): 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.

Michael Crichton: 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.

Odds On: Odds On is Michael Crichton's first published novel.  It was released in 1966 under the pseudonym of John Lange.  It is a short 215-page paperback novel.  Hard Case Crime republished the novel under Crichton's name on November 19, 2013.

Scratch One: Scratch One is Michael Crichton's second novel to be published.  It was released in 1967 under the pseudonym of John Lange.  It is a short 192-page paperback novel.  Hard Case Crime republished the novel under Crichton's name on October 29, 2013.

Binary (novel): 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.

Supporting paragraphs: Drug of Choice Michael Crichton
Answer: 1970