More opening lines of books

Anybody know of any other sites that might be of use in
finding the opening/closing lines of books? Well if not,
does anybody happen to know this one:

"Happy families are all alike, every unhappy family is unhappy… " >>>>>>>>???

I’m about 99% sure that’s from Anna Karenina.

Yes, opening sentence from Tolstoy’s Anna Karenina.

Nothing is a guarantee, but aside from running the lines through http://www.google.com/ you can also try the various reference works at Bartleby.com (including an older version of Bartlett’s Familiar Quotations and Brewer’s Dictionary of Phrase and Fable among others).