Across the ineffable expanse of the Great Deep float billions of shattered universes: the Shards. Populated with vengeful demons and tormented humans, the Shards need Earth to survive just as plants need water. Earth itself is kept alive by 36 righteous people, 36 hidden saints known as the Lamed Vav. Kill but a few of the Lamed Vav and the Earth will shatter, and all the Shards that rely upon it will die in a horrible cataclysm.
I dislike sci-fi books based on a religon. The author must be jewish. not for me.