A group of academic publishers is <A HREF="http://news.yahoo.com/s/ap/20050523/ap_en_bu/google_library_copyrights">challenging Google's plan to scan millions of library books</A> into its Internet search engine index, highlighting fears that the ambitious project will violate copyrights and stifle future sales. In a letter scheduled to Google, the Association of American University Presses described the online search engine's library project as a troubling financial threat to its membership--125 nonprofit publishers of academic journals and scholarly books.