Song of the Lioness quartet (Those count as one, right? Sure they do. If not, then I'd glue the covers together.)
Immortals quartet
Lord of the Rings
Jane Eyre

And I don't know about the fifth one. Maybe Mercury Beach, I quite like that one. Or the Tiggie Thompson books, I like those too. I should read them again...

Music and Lyrics
Notting Hill
Ever After
Phantom of the Opera
The Producers

ETA: I can't believe I forgot Lord of the Rings! But maybe that's a good thing, it'd make me homesick.