Seventeen-year-old Eleanor is nothing like her hero Eleanor Roosevelt. She is timid and altogether uncertain that she has much to offer the world. And as World War II rages overseas, Eleanor is consumed with worry for her Jewish relatives in Europe. When a chance encounter proves her to be a one-in-a-generation maths whiz-a fact she has worked hard all her life to hide-Eleanor gets recruited by the US Army and entrusted with the ultimate challenge: to fine-tune a top-secret weapon that will help America defeat its enemies in World War II and secure the world's freedom. This could be her chance to help save her family in Poland. Soon, she's swept from the basement of an Ivy League engineering school to the desert of California to an Army Air Corps base at Pearl Harbor, and finally, she takes to the skies above the South Pacific. But before she can solve this complicated problem, she must learn to unlock a bigger mystery: herself. The critically acclaimed author of The Poetry of Secrets, Cambria Gordon weaves an extraordinary story of remarkable courage and the will to unearth our deepest secrets, based on previously undiscovered true events.