From New York Times bestselling author Gena Showalter comes a fusion of modern and fantastical worlds, where a young woman must navigate a secret society, uncover a shocking enemy...and resist an undeniable attraction.

Twenty-year-old Arden Roosa knows only Ourland. Two worlds split and stitched together, with broken pieces from each, statues of fallen gods, and heavenly artifacts that are worshipped...or feared.

But nothing is more fearsome than the night.

A strange madness haunts the darkest hours, turning innocents into gleeful killers. Arden does her best to stay safe, until she reads a book written about her life―The Book of Arden―and everything changes.

Forced to join Fort Bala Royal Academy, Arden is paired with the ruthless High Prince Cyrus Dolion. But while he trains her for combat against a mystical adversary, she can't deny the sparks burning between them.

If her panic attacks and war games aren't enough, Arden is also tapped to join the Tome Society, rumored guardians of an invisible library with books that foretell the future. But the more she learns about the society, the less she understands about Ourland, the gods...and the person she's destined to be.