Writing about a world that was changed 200 years ago was a challenge but it was also a joy to stretch my imagination. How did people survive inside a dome? There had to be fans to keep the air cool, but there also had to be a system in place to feed them. Gardens were placed on rooftops to grow fruits and vegetables. Animals lived out their lives in tiny pens. And underground, where Wren and the “shiners” lived, they figured out a way to have power from waterwheels because having a fire in the mines is dangerous due to the buildup of methane gas.