The Folk of the Air Tome 1

Of course I want to be like them. They're beautiful as blades forged in some divine fire. And Cardan is even more beautiful than the rest. I hate him so much that sometimes when I look at him, I can hardly breathe. One terrible morning, Jude and her sisters see their parents murdered in front of them. The fearsome assassin abducts all three girls and brings them to the world of Faerie. Mocked and tormented for being merely mortal, Jude soon realises that to survive in the treacherous, dangerous world of the royal court, she needs to be as cunning and deceitful as the Fey themselves.
But the stairway to power is fraught with shadows and betrayal. And looming over all is the arrogant and charismatic Prince Cardan.