Kathy Furgang 
Zoom in on Power Grids [PDF ebook] 

When we flick on a lamp switch, we rarely think of the science and engineering behind the light. This straightforward and accessible text informs readers about the interconnected network that electricity takes as it moves from suppliers to users. From power stations and voltage switches to the power lines that lead to our homes, readers will gain a greater understanding of the energy we use every day. A follow-up activity utilizes a maze that allows readers to trace the correct path of electricity through a power grid.