Darkness looms as a deadly terrorist organization seeks a lost grimoire to power their catastrophic new magical weapon which threatens to plunge the world into chaos. Jayne Thorne must stop them, even if it means sacrificing everything she holds dear.
When CIA agent Jayne Thorne's mentor vanishes on a clandestine mission, she's thrust into a perilous quest to unravel the truth and find him. Her pursuit leads her to the heart of Paris, where she finds herself entangled in a web of intrigue, facing off against a ruthless terrorist organization and their terrifying weapon-a lethal poison that renders even the most formidable magicians powerless.
As Jayne battles this new threat, she grapples with the revelation that her sister has been concealing their family's true history for years. Meanwhile, her relationship with Cillian, whose Rogue magic struggles to harmonize with her otherworldly powers, becomes increasingly strained.
To make matters worse, Jayne's enemies demand she locate a necromantic grimoire hidden deep within France, or they will execute her mentor. With time running out and the fate of the world hanging in the balance, Jayne embarks on a desperate hunt for the grimoire, unlocking a forbidden power that could unleash the Master of Shadows-a long-dead sorcerer wielding a dark and destructive magic.
Now, Jayne must confront the deadliest magical forces she's ever encountered, protect her team from unimaginable threats, and make a choice that will determine the destiny of the world itself.
"Vivid world-building, a page-turning mystery and a smart, adventurous heroine... a] great addition to an outstanding urban fantasy series."
-Jayne Castle, New York Times bestselling author of the Harmony series