Portent by James Herbert

Something incredible is about to happen...Around the world, from San Francisco to the Indian city of Varanasi, from the Great Barrier Reef to the Taklimakan Desert, forces of unimaginable violence are being unleashed - earthquakes, volcanic eruptions, deadly hailstorms. Each disaster preceded by the mysterious appearance of strange, dazzling lights.Portents.Signs of a coming titanic struggle between the forces of darkness and light. A struggle involving a hermit in the remote Scottish Highlands with an extraordinary secret. Two very special children who unknowingly hold the future of the planet in their hands. And the grotesque matriarch of a bizarre New Orleans cult who is determined to destroy them...