Even if they only charge postage and copying costs, a donation will allow them to continue this service. There are also commercial book lending services. Books On Line Many organizations have been putting books, including history and genealogy books on-line . Check them out before you buy. Many newspapers have online articles about local history.
Many publishers have catalogues on-line .
You may find just the reference you need. As mentioned above, there are many used and rare booksellers on the net. You might find interesting references by searching these bookseller sites for surnames or locations. Don't forget to check out the soc.genealogy.marketplace newsgroup. You may also want to search the net for email or United States mail addresses of the authors of self-published books.