Super Short Summary

Prophecy of the Sisters by Michelle Zink follows twin sisters, Lia and Alice, in turn-of-the-century America, embroiled in a prophecy involving an age-old struggle between good and evil, as one sister must prevent the demon Samael's release while the other seeks to enable it. After their father's death, the sisters discover their roles and powers, leading to a confrontation that sets them on a quest for keys to alter their fate.