McPherson, Stephanie Sammartino: - Stephanie Sammartino McPherson wrote her first children's story in college. She enjoyed the process so much that she's never stopped writing. A former teacher and freelance newspaper writer, she has written more than thirty books and numerous magazine stories. Her recent books include Hothouse Earth: The Climate Crisis and the Importance of Carbon Neutrality, winner of the Green Earth Book Award for young adult nonfiction, and Breakthrough: Katalin Karikó and the mRNA Vaccine. Stephanie and her husband, Richard, live in Virginia.