'I Am Legend' is quite unusual for its time. I just wanted to write a story about female boxers, and I couldn't get that going in my mind. I don't know exactly where the idea of just a man pitting himself against a robot boxer came from.

I could never write about strange kingdoms. I could never do 'Harry Potter' or anything like that. Even when I did science-fiction, I didn't write about foreign planets and distant futures. I certainly never did fantasies about trolls living under bridges.

He stood there for a moment looking around the silent room, shaking his head slowly. All these books, he thought, the residue of a planet's intellect, the scrapings of futile minds, the leftovers, the potpourri of artifacts that had no power to save men from perishing.

In a typical desperation for quick answers, easily understood, people had turned to primitive worship as the solution. With less than success. Not only had they died as quickly as the rest of the people, but they had died with terror in their hearts, with a mortal dread flowing in their very veins.

Very well then! I'll write, write write. He let the words soak into his mind and displace all else. A man had a choice, after all. He devoted his life to his work or to his wife and children and home. It could not be combined; not in this day and age. In this insane world where God was second to income and goodness to wealth.