The lives of three women weave together across centuries in the dazzling new book from the Granta Best of Young British Novelist and author of All the Birds, SingingSurging out of the sea, the Bass Rock has always borne witness to the lives that pass under its shadow on the Scottish mainland. And across the centuries, the fates of three women are inextricably linked to this place and to one another.     Sarah, accused of being a witch, is fleeing for her life.     Ruth, in th