In this spellbinding debut novel, two estranged half-sisters tasked with guarding their family’s library of magical books must work together to unravel a deadly secret at the heart of their collection—a tale of familial loyalty and betrayal, and the pursuit of magic and power.

In the great tradition of Ninth House, The Magicians, and Practical Magic, this is a suspenseful and richly atmospheric novel that draws readers into a vast world filled with mystery and magic, romance, and intrigue—and marks the debut of an extraordinary new voice in speculative fiction.