Math Mysteries: The Fall Festival Fiasco (Hardcover) (ISBN-13: 9781250906878)

AARON STARMER is the author of more than a dozen novels for young readers. His novels have been translated into multiple foreign languages and have appeared on best of the year lists from Time magazine, the Wall Street Journal, the New York Public Library, YALSA, Bank Street College of Education, the Chicago Public Library, and School Library Journal. Unlike many authors, he really enjoys math. He lives in Vermont with his wife and two daughters.

MARTA KISSI is a Bath-based illustrator originally from Warsaw. She received her bachelor's degree in illustration animation at Kingston University and her master of arts in visual communication at the Royal College of Art. Her favorite part of being an illustrator is bringing stories to life by designing charming characters and the wonderful worlds they live in. She shares her artist studio with her husband, James, and their pet plant Trevor.