I am very pleased to announce the addition of a new database to Columbia's Jewish Studies collection, the Bibliography of the Hebrew Book. This exceptional resource is a detailed database of approximately 90% of the books printed in Hebrew letters between 1470 and 1960 (Ladino and Judeo-Arabic books are all included; Yiddish books are not – although the database does include books printed in both Hebrew and Yiddish) The database includes more than 141,000 titles, often with extensive bibliographic information (textual variants, unique pagination, etc.) about the individual books included in the records.
Much of the database, including the records themselves, are in Hebrew. For help with the site, feel free to contact the Jewish Studies Librarian (firstname.lastname@example.org).
At this point, a proxy (for offsite access) is not yet available. From a Columbia computer, you can access the site at http://www.hebrew-bibliography.com/loginform.aspx. (I will update when off-site access has been established.)
Update: The Bibliography of the Hebrew Book is now freely available online through the National Library of Israel.