An in-depth investigation of electricity and electronics for middle school and high school readers, revolving around the electron, the tiny negatively charged particle that is found in the atoms of all elements. Covering electric charges, currents, conductors, the author connects physics concepts to the development of electronics, from early vacuum tubes and transistors through the discovery of microchips and semiconductor materials. Includes diagrams, definitions of science words, experiments, glossary, further resources, and index.