BOOK ONE OF THE GRIPPING WITCH TRINITY SAGAA SUPERNATURAL SERIES FOR THIS GENERATION Three witches, Delf, Shorn and Serena, are unaware of their magical abilities until the Calling. After this, they become the most powerful source of magic the world has ever known. They become the Witch Trinity. For unknown reasons, the Calling spell has failed. Serena has not woken and an ancient dark witch, known as the Crow, has found her. Faced with staying hidden, Delf and Shorn have little option but to seek the Grimoire of Agrippa, the witch's bible, to help protect Serena as they struggle to prevent their unbalanced energy of life and death from consuming the world.