Matthew Brenden Wood is a math and science teacher with a passion for STEAM education. He is also an avid amateur astronomer and astrophotographer. Wood holds a bachelor's degree in astronomy from the University of Massachusetts at Amherst and lives in Phoenix, Arizona.

Tom Casteel is an illustrator and cartoonist with a master's degree from the Center for Cartoon Studies. Tom has illustrated several books for Nomad Press, including The Brain: Journey Through the Universe Inside Your Head; Cities: Discover How They Work; and Explorers of the New World: Discover the Golden Age of Exploration. Tom lives in South Bend, Indiana.