Echoes of the Great Song is a good book by author David Gemmell. The story tells of a big bear falling to the sky and the ocean. Then it sleeps for 10,000 years, the breath of sleep is death. The prophecy has come true, the tidal waves have flattened the planet, the ice age has just begun. Some survivors get up and avoid the barbaric tide. Then the moon appears in the sky and threatens life in the world.