Annotated list from October 2006 of authoritative websites on the "invisible web." The "invisible web comprises databases and results of specialty search engines that the popular search engines simply are not able to index." Topics include search engines, art, online books, business, consumer, finance, government, international, law, health, science, and transportation. Librarians' Internet Index is listed. From the Online Education Database (OEDb), a site that offers reviews of online schools and degree programs.