J.K. O'Sullivan introduces fascinating people and places to readers through books, articles, and blog posts. Her award-winning science, sustainability, and travel books for kids include Migration Nation (Charlesbridge, 2015), nominee for the AAAS/Subaru Prize for Excellence in science writing for children. She lives in Asheville, North Carolina, with her family.

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 Explore Ancient Chinese Myths! With 25 Great Projects and The Oregon Trail: The Journey Across the Country from Lewis and Clark to the Transcontinental Railroad . He is working on his first graphic novel.