I think a lot of authors deeply distrust Hollywood, and simply won't sell movie rights. Only one of the Travis McGee series was made into a movie, it was terrible, and John D MacDonald wouldn't sell movie rights to any more of them.
But he did of course sell movie rights to non-Travis McGee titles such as Condimumium, and several others.
Ditto Carl Hiassen. Striptease the movie was yuk.
Asimov would have hated I, Robot, the movie, because it was exactly the thing his series of short stories, I, Robot was protesting against: the cliche Frankenstein theme. As soon as I heard Will Smith was to star I knew it was going to be a turkey - all noise and action and no brains. And brainless Frankesntein theme all over again, reversing the thrust of the stories.
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