While I don't consider myself an Ayn Rand convert reading her books were so shockingly different from watchtower reading that it got me to thinking critically. I landed somewhere in the middle, but it was important to me to be exposed to something on the extreme side.
I have read The Fountainhead at least five times each time I read it I was at a different place in my life and got something completely different out of it. I have the book on my Kindle and am contemplating reading it again.
Beside Atlas Shrugged, I also really appreciated her book, We the Living. The description of the totalitarian life in Soviet Russia was very reminiscent of the totalitarian institution of the Watchtower. The similarities were striking