"Wales, 1941. As war rages across the globe and bombs fall from the sky, people all over the world begin to dream of King Arthur. The dreams spread like a fantastical plague, flooding people's sleep night after night. Whispers arise of wonders and unexplained sights - dragons in the London Underground, and strange lights over Stonehenge. Self-proclaimed prophets claim they are miracles, heralding Arthur's return at the time of Britain's greatest need. Elaine Ambrose has never dreamed of Arthur, and she doesn't believe in miracles. A librarian at the British Museum, she wants only to protect the museum's collection from the London Blitz, and is frustrated to be sent instead to catalogue a reclusive professor's private library on the coast of North Wales. But all is not as it seems. Soon Ellie must confront what she's tried to ignore: she dreams not of Arthur, but of Nimue - the Lady of the Lake. And her dreams promise not salvation, but a return to the darkness of the last days of Camelot"-- Provided by publisher.