Light Bulb

Kathleen Weidner Zoehfeld is the award-winning author of more than 75 books for young readers. When she's not reading, researching, writing, or editing, Kathleen loves to work as a volunteer at her local natural history museum. She lives in Berkeley, California, with her husband, son, and three cats.Stephanie Dehennin is a self-proclaimed nerd, and proud of it. Not only does she illustrate books for children, but she also is a skilled scientific illustrator. In 2017, she was awarded the Biannual Picturale Public's Choice Award.

NSTA/CBC Best STEM Book"The appealing Eureka! The Biography of an Idea series introduces primary-grade students to the history behind familiar inventions, from an initial concept or prototype to versions familiar to users today. The writing is simple, clear, and often lively. Richly colorful, digital artwork suggests the look of different time periods and cultures, while portraying individuals who developed each invention and showing how its appearance has changed through the years. Well attuned to the intended audience, this series is both engaging and informative." —Booklist"This series explores some of history’s greatest and most ubiquitous inventions. The illustrations...are a real highlight, colorful and engaging, setting the historical scenes nicely while providing clear and engaging diagrams. There is a palpable sense of good cheer in the depictions of Edison’s lab staff celebrating with high fives. Back matter provides some extra fun facts...and close[s] with a message about how improved energy efficiency benefits the body and environment. Perfect for STEM lessons and future innovators, this fun and informative series has a lot to offer." —School Library Journal"A concise, inclusive history of the evolution of the bicycle. The multicountry perspective (Germany, England, France, America, Ireland, and China are all mentioned) is a refreshing angle; also welcome is the information on ways bicycles were and are used, their efficiency, and the etymology of bicycle names and terms. This engaging history of the bicycle is sure to pique young riders’ interest while it enriches their knowledge." —Kirkus Reviews (for EUREKA!: Bicycle)"This concise history starts with German Karl Drais's 1817 invention of a wooden two-wheeled 'running machine'...[and] culminat[es] with 'a bicycle for just about everybody'....The lively illustrations keep pace with the accessible and engaging text." —The Horn Book (for EUREKA!: Bicycle)