From my Dad's SF collection; a book I'd read several times when I was younger, but not for several years.
Reread for the obvious reason that there's a film very loosely (and, having read the book again, let me underline that "very" a few times) based on some of the plot coming out.
It's still a good collection of interesting SF stories. What I'd forgotten was that it is an thinly-disguised anthology rather than a single cohesive story: there are connecting parts to put the stories in the context of anecdotes being told by Susan Calvin to an interviewer, but the changes in Asimov's style over the period in which the stories were written are quite obvious.
Recommended, but you probably didn't need me to tell you that.
ISBN 0586025324.