Pilgrims Progress is also fiction.
As for her books, they were written when the Conservative movement was at it's lowest ebb (40-50's) and very few writers wrote defending individualism, and free enterprise.
No matter what one may think of the quality of her books, they were crucial in influencing a whole generation of Americans to resist and reject the princples of collectivism that the post-WW2 generation had swallowed as gospel (e.g.FDR and the New Deal saved us from the Depression etc)
About halfway through the second reading, I decided it was like a lot of movies you see where you think - maybe - it's going to get better, but it never does.
I decided I could live my life without ever knowing John Galt.