Mara Thornton has been told all her life that she is destined for greatness. Marked by a mysterious crescent birthmark, she was taken from her family and raised within the Spire, where the High Sentinels prepared her for the sacred Ascension. The people believe Mara will become a goddess who will protect their world for another century.But Mara knows something is wrong.The coming eclipse will not transform her into a divine guardian. It will kill her.For a thousand years, the witches chosen by the Spire have been sacrificed to maintain the prison of a primordial entity hidden within the moon. Their souls become part of the chains restraining an ancient hunger, while the civilization below draws its magical power from the very force they are keeping asleep. The so-called holy sacrifice is actually an elaborate system of ritual murder-and Mara is destined to become its newest victim.When Mara discovers the forbidden Black Moon Scrolls, everything she believed about the Spire collapses. The previous witches were never queens or saints. They were transformed into spectral guardians, stripped of their humanity and consumed over centuries to keep the God dormant.With the help of the frightened archivist Leonard Hayes, the renegade Xander, and the enigmatic Oracle Arabella, Mara learns that she has another choice. A mysterious silver dagger known as the Silver Tear can sever the ancient tether-but doing so may destroy the source of magic itself. The Spire could fall. The enchanted lights could go dark. Civilization may have to survive without the power it has depended upon for generations.Mara must therefore choose between becoming another eternal prisoner or becoming the woman who finally breaks a thousand-year-old cycle. As the eclipse reaches totality and the imprisoned God begins to awaken, she refuses to surrender her identity. She is not a vessel. She is not a sacrifice. She is Mara-and she intends to make sure she is the last witch ever sent to the moon.A dark, atmospheric fantasy of forbidden magic, ancient conspiracies, sisterly love, sacrifice, rebellion, and one determined witch who must destroy the world's oldest lie to save its future.