Engineering: How the Six Simple Machines Support the World

Carla Mooney is an award-winning children's author. She has written more than 70 books for children and young adults, including many for Nomad Press, such as Climate in Crisis: Changing Coastlines, Severe Storms, and Damaging Drought and The Physics of Fun. She lives in Pittsburgh, Pennsylvania.

Lex Cornell is a graduate of The Center for Cartoon Studies. They have illustrated several books for Nomad Press, including the Picture Book Science: Biomes set, Climate Change: The Science Behind Melting Glaciers and Warming Oceans; Rocks and Minerals: Get the Dirt on Geology; and Gender Identity: Beyond Pronouns and Bathrooms. Lex lives in Lincoln, Nebraska.