From the back of the book:
In the small town of Potter's Lake lies a secret. A secret of conspiracy. A secret of darkness. The secret of the true nature of the universe and human destiny. Now, that secret is about to be uncovered. And nothing will ever be the same again.
You are a resident of Potter's Lake. You must discover that nothing you ever believed in was wholly true. You will help decide the final fate of humanity in the coming Apocolypse.
ARE YOU READY TO TOSS THE DICE?
Forget the dice! Heaven & Earth features Event Horizon's brand new diceless, deterministic action resolution system. It's just you, your skill, and your destiny against the machinations of a universe that is not what it seems. There's nothing random about that. Take hold of your destiny or have it decided for you. Forever.