Sorry for late answer, I was sleeping. So far I read a bunch of his shorter stories and I'll have to go with the common choice of "The last question". "Nightfall" was also really good. Next I'm planning to read the Foundation series.
Foundation was my favorite (so far) of all his stories. I read the first 6 books of the series in the order they were published and it was quite satisfying.
Sorry for late answer, I was sleeping. So far I read a bunch of his shorter stories and I'll have to go with the common choice of "The last question". "Nightfall" was also really good. Next I'm planning to read the Foundation series.
Foundation was my favorite (so far) of all his stories. I read the first 6 books of the series in the order they were published and it was quite satisfying.