John Michael Crichton (; October 23, 1942 - November 4, 2008) was an American author, screenwriter, film director and producer best known for his work in the science fiction, thriller, and medical fiction genres. His books have sold over 200 million copies worldwide, and over a dozen have been adapted into films. His literary works are usually within the action genre and heavily feature technology. His novels epitomize the techno-thriller genre of literature, often exploring technology and failures of human interaction with it, especially resulting in catastrophes with biotechnology.

Aside from fiction, Crichton wrote several other books based on medical or scientific themes, often based upon his own observations in his field of expertise. In 1970, he published Five Patients, a book which recounts his experiences of hospital practices in the late 1960s at Massachusetts General Hospital in Boston, Massachusetts. The book follows each of five patients through their hospital experience and the context of their treatment, revealing inadequacies in the hospital institution at the time. The book relates the experiences of Ralph Orlando, a construction worker seriously injured in a scaffold collapse; John O'Connor, a middle-aged dispatcher suffering from fever that has reduced him to a delirious wreck; Peter Luchesi, a young man who severs his hand in an accident; Sylvia Thompson, an airline passenger who suffers chest pains; and Edith Murphy, a mother of three who is diagnosed with a life-threatening disease. In Five Patients, Crichton examines a brief history of medicine up to 1969 to help place hospital culture and practice into context, and addresses the costs and politics of American healthcare. As a personal friend of the artist Jasper Johns, Crichton compiled many of his works in a coffee table book, published as Jasper Johns. It was originally published in 1970 by Harry N. Abrams, Inc. in association with the Whitney Museum of American Art, and again in January 1977, with a second revised edition published in 1994. In 1983, Crichton wrote Electronic Life, a book that introduces BASIC programming to its readers. The book, written like a glossary, with entries such as "Afraid of Computers (everybody is)", "Buying a Computer", and "Computer Crime", was intended to introduce the idea of personal computers to a reader who might be faced with the hardship of using them at work or at home for the first time. It defined basic computer jargon and assured readers that they could master the machine when it inevitably arrived. In his words, being able to program a computer is liberation; "In my experience, you assert control over a computer--show it who's the boss--by making it do something unique. That means programming it....If you devote a couple of hours to programming a new machine, you'll feel better about it ever afterwards". In the book, Crichton predicts a number of events in the history of computer development, that computer networks would increase in importance as a matter of convenience, including the sharing of information and pictures that we see online today which the telephone never could. He also makes predictions for computer games, dismissing them as "the hula hoops of the '80s", and saying "already there are indications that the mania for twitch games may be fading." In a section of the book called "Microprocessors, or how I flunked biostatistics at Harvard", Crichton again seeks his revenge on the medical school teacher who had given him abnormally low grades in college. Within the book, Crichton included many self-written demonstrative Applesoft (for Apple II) and BASICA (for IBM PC compatibles) programs. In 1988, he published Travels, which also contains autobiographical episodes covered in a similar fashion to his 1970 book Five Patients.

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