Judaica at the Library of Congress
A friend forwarded the URL for an interesting online Judaica encyclopedia, the Jewish Virtual Library. The information is broken into small chunks at times, and like all encyclopedias there is often just enough to whet your appetite, but not enough to answer questions. Still, take a look at the Library of Congress holdings detailed at the Jewish Virtual Library and enjoy. There is enough there to get a sense of Hebrew books and printing and want to learn more.