Told poetically from the perspective of the sun, Bang’s latest illuminates electricity and explains how humans harness energy from water, wind, earth, and sun. A dramatic opening spread draws readers in, depicting a city seen from above, its stippled light reflected stars in an inky night sky. The sun, Bang explains, is the biggest star of all, radiating light and heat. Later, she uses a trio of overlapping panels—reminiscent of traditional Japanese nature scenes—to home in as water, warmed by the sun, returns to earth as rain, flowing from mountaintop to rushing river. Throughout, Bang uses these panels to emphasize technical elements, such as the flow of electricity from turbines to generator. Backmatter offers further detail on fossil fuel and solar power. (Picture book. 5-9)