For generations, the Kalotay family has guarded a collection of ancient and rare books. Books that let a person walk through walls or manipulate the elements--books of magic that half-sisters Joanna and Esther have been raised to revere and protect. All magic comes with a price, though, and for years the sisters have been separated. Esther has fled to a remote base in Antarctica to escape the fate that killed her own mother, and Joanna´s isolated herself in their family home in Vermont, devoting her life to the study of these cherished volumes. But after their father dies suddenly while reading a book Joanna has never seen before, the sisters must reunite to preserve their family legacy. In the process, they´ll uncover a world of magic far bigger and more dangerous than they ever imagined, and all the secrets their parents kept hidden; secrets that span centuries, continents, and even other libraries . . . 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.