The Woman Who Smashed Codes:
A True Story of Love, Spies, and the Unlikely Heroine who Outwitted America's Enemies
by Jason Fagone
I've been on the library reserve list for this ebook for months. True story of Elizebeth Smith who began her career trying to solve ciphers in the works of William Shakespeare, then, together with her husband William Friedman, developed the modern science of cryptology.
I haven't had much time to read...at lunch and for a few minutes at bedtime before I fall asleep. Only about 10% read so far.