The Age of Reason is a great book. You might want to get some of your information from sources other than Atheist websites. Their view is skewed from the start. I've also read Ayn Rands books and visited her website before. My older sister is somewhat a disciple of Rand. Rands philosophies are akin to Hegel’s superman philosophy. Hegel was a metaphysic. (Believed in God.) Rand doesn’t.
I’ve always thought it curious how the Atheist uses God when it’s to their advantage.