The following is a wonderful URL for what is basically Germany's
"Books-In-Print" catalog, plus capability of ordering.

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Start
at a Dusseldorf bookstore (German and English)

http://www.stern-verlag.de/

or go to the search engine (only German)

http://www.buchkatalog.de/bin/isuche.exe?aktion=suche&caller=sternvlg

and find every book available on the German market.

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Now, does anyone happen to know a URL for the US Books in Print
catalog??

/m