Together we lifted our feet and stepped into the unknown. Shortly after Diana Bishop and Matthew Clairmont timewalk to London, 1590, they discover that the past may not provide a safe haven after all. Reclaiming his former identity as poet and spy Matthew Roydon, the vampire falls back in step with a group of radicals known as the School of Night who share dangerous ideas about God, science, and man. Many of his friends are unruly daemons — the creative minds of the age who walk the fine line between genius and madness — including playwright Christopher Marlowe and mathematician Thomas Harriot. Matthew, himself, is expected to continue to spy for Queen Elizabeth, which puts him in close contact with London's cutthroat underworld. Together, Matthew and Diana scour the bookstalls and alchemical laboratories of London where they follow the elusive trail of Ashmole 782 — and search for the witch who will teach Diana to control her powers.

An epic, richly inventive, historically sweeping, magical romance. When historian Diana Bishop opens an alchemical manuscript in the Bodleian Library, it's an unwelcome intrusion of magic into her carefully ordered life. Though Diana is a witch of impeccable lineage, the violent death of her parents while she was still a child convinced her that human fear is more potent than any witchcraft. Now Diana has unwittingly exposed herself to a world she's kept at bay for years; one of powerful witches, creative, destructive daemons and long-lived vampires. Sensing the significance of Diana's discovery, the creatures gather in Oxford, among them the enigmatic Matthew Clairmont, a vampire genticist. Diana is inexplicably drawn to Matthew and, in a shadowy world of half-truths and old enmities, ties herself to him without fully understanding the ancient line they are crossing. As they begin to unlock the secrets of the manuscript and their feelings for each other deepen, so the fragile balance of peace unravels...