The main idea is to make buildings comfortable and energy-efficient. The authors show how engineers and architects work together to design a new building on a university campus. They focus on getting the right amount of natural light inside. By using special computer programs like DesignBuilder and Revit, they create simulations to test different options. Everyone involved talks a lot and makes choices based on what they prefer. This way, they are able to create a building with great natural light. The different experts, like architects and engineers, come together to make sure the building is comfy and saves energy.