Cell Phone Science

Gr 6—9—The book sets out to help readers understand the complex science behind these devices. The first chapter provides an introduction to the device and its history, ranging from flag waving and smoke signals to the current smart phones (not listed in the index or glossary). The following chapters discuss all aspects of the phone from the outside in (plastic shell, semiconductor chips, software, call transmission, batteries, and more).The final chapter, "Thank you for turning OFF your cell phone," addresses some of the safety issues concerning this technology and why users are asked to turn their phones off on planes and in hospitals and the possible medical risks associated with their use. Lastly, privacy issues are mentioned. The book features clear explanations, easy-to-read text, and colorful photographs and illustrations on almost every page. Boxed areas and information in the margins supplement the text. Students interested in learning the story of the science behind their cell phone will be well rewarded with this title.—Maren Ostergard, King County Library System, Issaquah, WA