lots of people know the Internet Movie Database, a site which includes almost every movie and show ever recorded and aired. A very handy site if you got a question about anything recorded.
Here's a link to a site that attempts to do the same for books:
IBL
The database is ever increasing as they depend on everyone to submit books for the lists, as long as they have been released in English (hopefully that will change eventually and the list will include all books :).