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Margaret Frith is the author of numerous children's books, including several titles in the Who Was? series, such as Who Was Thomas Alva Edison?, Who Was Louis Braille?, Who Was Franklin Roosevelt? and Who Was Woodrow Wilson? She lives in New York City. John O'Brien has held writing fellowships at the University of Iowa and Stanford University, and he was the recipient of a National Endowment for the Arts fellowship. His work has appeared in Hudson Review, Massachusetts Review, TriQuarterly, Country Journal, Harrowsmith, and Gray's Sporting Journal. He lives with his wife, Becky, in Franklin, West Virginia. Nancy Harrison is an illustrator known for the Who Is... series and for graphic illustrations for Fortune 500 Companies. Nancy received her master's degree from Syracuse University.