Google Reader

I had never heard of Google Reader or anything like it before doing this Thing. It might be something I would use. I get tired of typing in my favorite websites, so it would be helpful to have them all listed there. I tried to subscribe to one website and couldn't do it for some reason. Does anyone have any suggestions about why I couldn't subscribe to it? The url is http://www.mansfieldbible.org/. I just went to the site from my blog and tried to copy and paste the link here and couldn't even do that. I had to type it in. Do some websites block people from adding links to their blogs somehow?