I am looking to buy copies of the illusion works BOOK series (volumes 1-4) from Rand Woodbury. The books are unavailable at most shops. Does anybody know where I can get copies? Thanks.

Rand Woodbury has an online store: illusionworksstore.com (I purchased vol.4 there, but I've just checked it and apparently is down) You can try Rand's email randwoodbury@hotmail.com
Anyway, there are many online stores that sell the books. I usually buy magic online and often see them advertised, maybe not the 4 in the same shop, but certainly doing a little research you can find them easily.

Thanks, think I will mail him. Have tried many, many online shops and everywhere it's out of stock. But thanks for his email address.

You can try contacting Rand via FB too: https://www.facebook.com/illusionworksstore/

No advertising intention, just as an example, surely you have them in more places:
Vol 1 https://www.daytonamagic.com/illusion-wo......333.html
Vol 2 https://www.daytonamagic.com/illusion-wo......334.html
Vol 3 http://themagicwarehouse.com/cgi-bin/findit.pl?x_item=MA8410