What largely pushed me in the direction of writing my term paper about him was reading Dinesh D'Souza's book "What's So Great About America." The first chapter was printed in .pdf format on the Young America's Foundation website shortly before the book was released, and I saw the part where he mentioned Qutb. We obviously talked about him in my class, so I decided to do my paper about him.
When I made my trip to the university library, the few outright sources about Qutb had been taken out, so it took me a little bit more time to find sources, but what I did find was great. By the time I got around to sitting down and writing the paper, the one source that I wanted to use was back in the library, so I got to use it. I'll have to check out Ruthven's book now. Thanks for telling me about it. :-)