ISBN-13: 9781548835538 / Angielski / Miękka / 2017 / 70 str.
Follow a young girl who hates math as Rear Admiral Grace Hopper takes her on a time travelling journey through her past. Hopper shows the girl, Sally, how she was always curious and fascinated by numbers. She teaches Sally that the math she hates so deeply is actually the heart and soul of all the technology she loves to use everyday and that without it the world would be very different.