Someone from the UK is selling the books on Ebay for a lot more money. It may have originated in the UK. If you have questions about it, you can contact the seller and ask, if you're an Ebay member.

http://cgi.ebay.com/Non-Motor-Sympto...3286.m63.l1177

Yes, it's edited by an UK group of doctors specializing in NMD symptoms, and includes papers by international experts. I wonder if the experts are clinicians, research scientists, or both.

At Amazon you get this deal:

Get $5 worth of MP3 downloads from Amazon MP3 when you order $75 or more in textbooks.