The Fountain Head by Ayn Rand
I just finished listening to The Fountain Head on mp3. It's an amazing book and will, I am sure, appeal to anyone who is passionate about anything. It's 36 hours long and well worth it. As it was coming to a close, I didn't want it to end. Yet at the same time, I was dying to see how it climaxed.
Probably one of the best books that I have ever listened to or read.