The Riverrun Trilogy

Imagine you're on a mission of life and death. Suddenly, on a desolate back road in Arizona, the world shifts beneath your feet. You find yourself on a river of blood, a conduit that connects alternate dimensions like a highway connects towns, and there is only one way back to the mortal world you know. It happened to the Etchisons - father Philip, mother Mary, and teens Joshua and Theo. An ordinary family save for two Mary is dying and, unknown to anyone, Theo may be the key to saving her - and everything else in the universe - from certain death.