Hi Mike,
Yes Moire patterns are a nusiance when scanning from books, mags etc, or even taking photos off the tv.
I don't own a scanner,(had 2, but both packed up) I now take photos of everything and get rid of the pattern in photoshop or paintshop pro.
If you google moire pattern there are some good articles on how to remove it during scanning, hope you don't mind me telling you this (you may already know it).
Regards John1.