★ "A fast-paced, sometimes brutal thriller reminiscent of Dan Brown's The Da Vinci Code."―Booklist (starred review)

From the bestselling author of The Quarry Girls comes this blockbuster thriller featuring a troubled codebreaker who must reach back through centuries of America's secret history to save the first viable US female presidential candidate from assassination.

Salem Wiley is a genius cryptanalyst, courted by the world's top security agencies ever since making a quantum computing breakthrough. She's also an agoraphobe afraid to leave her home. When her mother's disappearance is linked to a plot to assassinate the country's first viable female presidential candidate, she's forced out of her safe zone.

Drawn into a labyrinth of messages encrypted by Emily Dickinson and century-old codes tucked inside the Beale Cipher, Salem begins to uncover the truth: an ancient and ruthless group is hell-bent on ruling the world, and only a select group of women stands in its way.

★ "...[A] hair-raising thrill ride." ―Library Journal (starred review)

"The fascinating historical information combined with a storyline ripped from the headlines will hook conspiracy theorists and action addicts alike."―Kirkus Reviews

"This suspenseful tale has something for absolutely everyone to enjoy."―Suspense Magazine

"Fans of The Da Vinci Code are going to love this book."―Crimespree Magazine

"A bona fide page-turner."―Alison Gaylin, USA Today bestselling author