Too Scared to Move

What would happen if we could go back in time and have God say "yes" instead of "no" to one of our prayers? The strong-willed girl in this middle-grade novel gets a chance to find out.
Though Crystal prays desperately for God to stop the move her family plans to make to a new town, she is devastated when God allows her house to sell. By the time the moving van arrives, Crystal is no longer on speaking terms with God.
She arrives in a new school and discovers the substitute teacher is an angel...