Please try the Next Generation Melvyl Pilot

The European Library is an Internet service that offers access to the resources of 47 European national libraries. The European Library portal offers free searching, and delivers metadata records as well as digital objects: some free, others at cost.

Google Book Search is a tool from Google that searches the full text of books that Google scans, OCRs, and stores in its digital database. Formerly known as Google Print, up to three results from the Google Book Search index are displayed above search results in the Google Web Search service (google.com). A user may also search just for books at the dedicated Google Book Search service. Google limits the number of viewable pages and attempts to prevent page printing and text copying of material under copyright.

Harvard has been touting a digital library since 2000, but sadly, it is not worth searching as it is still nowhere near ready for showtime. Here is the link anyway.

The Michigan Digitization Project is a partnership with Google books to digitize the entire collection of the University of Michigan Library. The digitized collection, called MBooks, is searchable in the University of Michigan library catalog, Mirlyn, as well as in Google Book Search. Full-text of works that are out of copyright or in the public domain are available.

The New York Public Library (NYPL) is one of the leading public libraries of the world and is one of America's most significant research libraries. It is one of the largest public library systems in the United States and one of the largest research library systems in the world.

Tufts University's digital library initiative (humanities). [crash-prone]

You can search the Rapidshare database with a standard Google search. Nothing else seems to work. Click here, then add your a space and your search term to the results and you will find a lot of files with books in them.