¿Quién fue Marco Polo?

Joan Holub is the New York Times–bestselling author and illustrator of more than 140 children’s books, including Breakout at the Bug Lab, Who Was Babe Ruth?, and the Goddess Girls series. Prior to publishing her first title in 1992, she was an associate art director at Scholastic.

Who HQ is your headquarters for history. The Who HQ team is always working to provide simple and clear answers to some of our biggest questions. From Who Was George Washington? to Who Is Michelle Obama?, and What Was the Battle of Gettysburg? to Where Is the Great Barrier Reef?, we strive to give you all the facts. Visit us at WhoHQ.com

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.