I picked this up as an audiobook to get back into adding audiobooks to my daily routine. To be quite honest: I probably would not have finished this had I read it as a physical copy. There's a lot going on and the author weaves many different biographies as a means of showcasing the role female codebreakers played in the second world war - it's easy to lose track of who's who in ever-shifting landscape of 1940s cryptanalysis. Nonetheless, I appreciated Liza Mundy's attention to detail and while it was hard to fully comprehend the cryptanalytic processes through audio alone, it made things feel a bit more tangible. Having lived in Northern Virginia in the past, it was quite fun to hear about all the places that I used to call my neighborhood as they were visited by the "code girls".

One downside to the audiobook was the narrator's voice: while she spoke slowly and clearly enough that I could listen at my usual 1.5x-2.0x speed, I often felt like I was listening to a text to speech program reading a script. There was no variation in tone, pace or delivery, which I gradually toned out, but which certainly didn't add to my reading experience.