Book Search at Hay  
   Searches resources, both on and off the Internet, to find required books.
   http://www.booksearch-at-hay.com/

HP Bookfinders  
   A service that specializes in the location and supply of out-of-print and hard to find publications.
   http://www.hp-bookfinders.co.uk/

Used Books Finder  
   Find out-of-print, rare, and antiquarian books by completing an on-line form.
   http://www.usedbooksfinder.com/

121Books Search Service  
   Out of print, rare or antiquarian book search service providing a customised service.
   http://www.121books.co.uk/

BookRequest.com  
   Off line search; contact by email or form.
   http://bookrequest.com/

BiblioQuest  
   Search with no obligation; quotes sent via email.
   http://booksearch.biblioquest.com.au/ps/search/

Mountain Books  
   Locates out-of-print, used, rare, and antiquarian books. No obligation to purchase.
   http://www.mountainviewbooks.com/

Eastbay Books  
   Offers to find out-of-print books offered for sale by 5500 booksellers worldwide.
   http://www.eastbaybooks.com/

Eureka Booksearch  
   Local and International antiquarian, second hand and new, book search and mail order service.
   http://www.geocities.com/eurekabooksearch/

The Big Link  
   Affiliated with bookstores in USA, Canada, United Kingdom and Japan.
   http://www.booksearch.com/

I'll Find It  
   Book finding service.
   http://www.illfindit.net/

Ashworth Books  
   Features search for used, out-of-print, rare or collectible books.
   http://www.ashworthbooks.com/home/index.php

Hooveys Books  
   A service for tracing out-of-print and hard-to-find books. Old or modern, hardbacks and paperbacks.
   http://www.hooveys.co.uk/

Glyn's Books  
   Booksearch service specialising in out-of-print books on history, the sciences, the arts, natural history and other academic topics.
   http://www.glynsbooks.com/