I'm not going to sit here and explain objectivism because I'm pretty sure just about everyone is at least somewhat familiar with it.
Objectivism has its good and its bad and Ayn Rand can get a little fanatic and even crazy about it, sometimes making her sound like an anti-communist propaganda writer. She's really not all bad though.
Philosophy aside, this is a science fiction novel. It's a story that has been told many times since and probably even before. It's fairly predictable but it's an enjoyable, well told story, despite how you may feel about Rand.