This was an extraordinary account of code-breaking in the US. I had no idea that this was how it was done. The author did her best to weave personal stories between dry logic and mathematics. The bounce between the two was a bit strange because the women's stories were light and bouncy and math is not. This book should be a must read in the classroom.
Liza Mundy is a staff writer at The Washington Post and the bestselling author of Michelle: A Biography and Everything Conceivable, among other works.