New York: Greenwillow Books / Harper Collins, (2017) dj. SIGNED hardcover - A picture book for slightly older readers which delves into the vast numbers in the universe from three trillion trees to the fact that seven billion people weigh about the same as ten quadrillion ants, a hundred billion trillion stars in space to thirty-seven billion rabbits on Earth but ends with there is only one unique you. SIGNED on the title page by the illustrator Isabel Greenberg with the words "always look up." A Boston Globe/Horn Book Honor Book and winner of the Mathical Book Prize. Author's note. Large square format, unpaginated. ISBN: 978-0062455789.