Sabriel, yeah that is a great book!! The other two are equally as enthralling, Abhorsen and Lirael. Very much enjoyed them.
I'm currently reading the second installment of the Pellinor Series, The Riddle. Also very good books!! They are mainly about a girl named Maerad who begins as a slave and is saved by a mysterious stranger called Cadvan. He then discovers she is a "bard" or Star Person" like him and opens up the world of barding to her.
He believes that she is "The One" that has been sent to rid the world of the Nameless Ones darkness, but all is not as it seems and bards of the light turn out to be bards of the dark.
Its an awesome read, recommend it to all