[MagnumPIG]

Just to counter-nit-pick, the word "bible" is very often used as meaning "the most popular book about a certain thing", the book doesn't have to be accepted by everyone in the movement. And Atlas Shrugged is almost certainly the most popular libertarian book.

It sounds like you're saying she wasn't a libertarian because she labeled herself as an objectivist but a) it doesn't matter what she labeled herself as and b) it can be seen as just a subset, I struggle to think of any incompatibilities between the two, especially since libertarianism is used with much looser meaning.