Sean O'Neill is an illustrator and writer living in Chicago. His colorful, vibrant illustrations have appeared in publications from Pearson, Harcourt, McGraw-Hill, Capstone Press, and many others. In 2013, Sean released his first graphic novel for young readers, Rocket Robinson and the Pharaoh's Fortune, which was named one of the Best Books of the Year by GeekDad.com. The sequel, Rocket Robinson and the Secret of the Saint, was released in fall of 2016. Sean is also known for his series of live-drawing "whiteboard" videos on language and other topics, produced by mentalfloss.com.