"If you saw the movie........"
...But didn't get round to reading/hearing the book yet, you absolutely must as soon as possible. The movie, whilst fairly entertaining in it's own right, is a travesty vis a vis the book, and it's arguably the most blatent misappropriation of a book title ever. (though to be fair to the producers of the movie, in the credits they say "suggested by I.Robot"). If you are new to Asimov, also relish the regrettably only other Asimov audio book so far available here, which he reads himself. Pure pleasure.