Candace Fleming writes rhythmically for teeny tinies, voice-driven nonfiction illustrated by her husband Eric Rohmann, super well organized older nonfiction and excels at them all. Her newest, THE ENIGMA GIRLS: HOW TEN TEENAGERS BROKE CIPHERS, KEPT SECRETS, AND HELPED WIN WORLD WAR II. Staying firmly in the girls’ point of view, Fleming maintains the sense of tension these teens felt after willingly taking on stressful work and keep the secrets and themselves in check.  You can find more information about this book and the audio in the purchase link below.