The most direct route into Rand's novels is to understand she wasn't writing fiction first; she was building a vehicle for her philosophy, which she called Objectivism. Her characters aren't people so much as archetypes—embodiments of rational self-interest, like Howard Roark, or warnings against collectivism, like too many of the villains. The plots are engineered to prove a point: that the individual creator, unshackled by societal demands for altruism or conformity, is the engine of all human progress and deserves every reward. It makes for a very specific reading experience. The dialogue often turns into lengthy speeches, the heroes can feel superhumanly capable, and the moral alignment is starkly black and white.
That said, the philosophy is the whole point. If you try to read 'Atlas Shrugged' as a conventional novel about industrialists, you'll likely bounce right off it. You have to engage with the argument she's making, even if you ultimately disagree. The influence is so total that it creates a unique literary artifact—a book where the ideas are the main character. I find the prose itself can be surprisingly vivid in places, especially her descriptions of machinery and architecture, which she treats as extensions of human creative will.