Gamearth

A realm that began as the setting of a game has crossed over into reality. David wants to erase this invented universe in one final conflict, and Melanie and the people of that world must stretch its rules as far as they will go just to keep going.

What becomes of a game once its players walk away from it? Anyone who owns a bag of polyhedral dice has likely wondered about that. The book also asks whether creation is a kind of sorcery, and what happens to a world, its people and its laws after someone has spent years shaping them.