Hi,
My name is Feng Zhu. I visited your site and saw that you have links to 
other books' search and price comparison sites, I thought you may be 
also interested in my site. I recently launched a book search and price 
comparison service at: http://www.bookfinder4u.com

It searches 55 bookstores worldwide, including a dozen out-of-print 
book stores and can normally save 20%-90% off list price on a single book. 
This is a free service and very easy to use.

If appropriate, please feel free to link to it and I think your site 
visitors will benefit from it. Any feedback is greatly appreciated as 
this is a new service and I'm striving to improve it. 
 
If you don't like it, sorry for the trouble.
Thanks
 
Yours truly,
Feng Zhu