Prophecy of the Sisters — Michelle Zink

AN ANCIENT PROHECY DIVIDES TWO SISTERS -- ONE GOOD ... ONE EVIL ... WHO WILL PREVAIL?

Twin sisters Lia and Alice Milthorpe have just become orphans. They have also become enemies. As they discover their roles in a prophecy that has turned generations of sisters against each other, the girls find themselves entangled in a mystery that involves a tattoo-like mark, their parents' deaths, a boy, a book, and a lifetime of secrets.

Lia and Alice don't know whom they can trust. They just know they can't trust each other.