I don't think Arlyn Sieber is going to appreciate it if you keep copying and pasting from his book without either permission or attribution.
In doing so you leave Numista liable to DMCA complaints. If the author were to file a DMCA dispute with Google, it is possible that the website would lose any funding from it's AdSense account.
If you wish to quote from an author's work, the Fair Use Doctrine allows this as long as you include only a brief (usually less than 50 words) extract AND a link to the original article. You can't simply re-publish somebody else's work under you own name!
http://en.wikipedia.org/wiki/Digital_Millennium_Copyright_Act
As someone who has been the victim of copyright theft, I hope you will understand if I report you to the person who actually put the time and effort into writing the article should you persist in this activity.
Non illegitimis carborundum est. Excellent advice for all coins.
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