Erg, a cartoon energy-bolt, narrates this electrifying introduction to the basics of energy. A spread is devoted to each of the many types of energy, how they are harnessed, their uses and their pros and cons: Fossil fuels, nuclear, solar, wind, water, geothermal and plant-based energy are all discussed. Leedy presents difficult concepts in a way that even younger readers can understand, encapsulating the key essentials and leaving the complex details for older readers’ texts. Additional pages explain the generation of electricity, address the problem of global warming and educate readers about how they can help save energy. Throughout, the watercolor-and-digital artwork cleverly illustrates the concepts presented in the text with cartoons, diagrams and sketches. The author’s whimsical anthropomorphized electrical outlets and devices keep readers’ attention and provide further information. Backmatter includes more energy facts and ways to save energy as well as additional cons against fossil-fuel usage. What Anne Rockwell and Paul Meisel’s What’s So Bad About Gasoline? (2009) did for fossil fuels, this book does for energy as a whole. (Informational picture book. 5-8)