From our homes and schools to stores and restaurants, Wi-Fi has changed how we send and receive information and how we stay connected to the internet and each other. The story of Wi-Fi begins as far back as the discovery of radio waves. Readers will learn how it developed from there and gain an appreciation for the invisible world behind the wireless computer technology we rely on today. Relatable sidebars and effective graphic organizers aid in understanding essential STEM concepts, while relatable photographs complement the well-researched text.