Detailed backmatter further explains this fascinating natural process.

    He intertwines Nicky’s efforts with the story of one of the children he saved—a young girl named Vera, whose family enlisted Nicky’s aid when the Germans occupied their country. As the war passes and Vera grows up, she must find balance in her dual identities—one her birthright, the other her choice.

    She knew how many miles it was to the moon (and how many back). She loved studying algebra and geometry and calculus and using math to solve problems in the outside world.Soon math led her to MIT and then to helping NASA put a man on the moon! She handwrote code that would allow the spacecraft’s computer to solve any problems it might encounter. Apollo 8. Apollo 9. Apollo 10. Apollo 11. Without her code, none of those missions could have been completed.Dean Robbins and Lucy Knisley deliver a lovely portrayal of a pioneer in her field who never stopped reaching for the stars.