The Enigma Girls: How Ten Teenagers Broke Ciphers, Kept Secrets, and Helped Win World War II by Candace Fleming.

The Bletchley Riddle by Ruta Sepetys and Steve Sheinkin.

Bletchley Park and the code breakers who lived and worked there during World War II are hot topics these days. Maybe it’s because the whole episode is less “mined” because of all the secrecy that surrounded the work there. Maybe it’s just a fleeting trend. At any rate, there do seem to be a lot of books about Bletchley floating around, but not so many for the younger set. Until now.

These two books, one fiction and one nonfiction, were recently published (2024) and are appropriate for young people about 13 years of age and up. The Enigma Girls tells the story of several teenaged girls who were recruited to work at Bletchley either because of their math skills or their language proficiency. But these girls were not, for the most part, doing the high level code breaking that was the most intriguing and intellectually challenging work going on at Bletchley Park. Rather, they were keeping records on notecards of all of the code words and German double speak that had been decoded. Or they were servicing and keeping the huge “bombes” running. These were the machines that were created to infiltrate and determine the settings for the German Enigma coding machines. Machines (or primitive computers) were fighting machines, and teenagers were keeping the machines moving and computing.

By limiting her story to the females who worked at Bletchley, gifted nonfiction author Candace Fleming risks over-emphasizing and even distorting the role that these women and girls played in the overall mission of breaking and intercepting the Nazi communications. But she doesn’t fall into that trap, and instead as I read I was moved to admire the persistence and hard work of these unsung heroines who toiled in harsh conditions doing work that they were unable to discuss or even understand completely. It wasn’t a romantic, spy-novel kind of job. The “bombes” were huge, oily, and loud, and the girls who tended them knew very little about how they worked or what significance their work might have. And after the war was over, the Enigma Girls were still left in the dark about how their work helped England win the war because they and everyone else who worked with them were bound to secrecy by the Official Secrets Acts that they all had to sign. They only knew that they were needed to “do their part” in defeating Hitler—and they did.

The Bletchley Riddle, although it is “based on the real history of Bletchley Park, Britain’s top-secret World War II codebreaking center,” makes the whole setting and story much more exciting and romantic. (Fiction can do that.) Ruta Sepetys and Steve Sheinkin, both well known in YA literature circles, wrote this spy novel together, and the joint authorship shows. It’s a bit disjointed at times, but the two authors do tie up most all of the loose ends by the end of the story. Fourteen year old Lizzie Novis has lost her mother, Willa, a single parent who works for the U.S. Embassy in London. Willa went to Poland to help evacuate tens of U.S. Embassy there in anticipation of the Nazi invasion of Warsaw. And she didn’t come back. Everyone says that Willa is dead, that she most likely died in the invasion. But Lizzie is sure that Willa is still alive, and she’s determined to find her mother no matter what it takes.

I’ll let you read to find out how Lizzie ends up in Bletchley, with several hurried trips back to London. I’ll let you read about Lizzie’s older brother Jakob, and how he becomes the other major character in the story. And finally in the pages of the book, you can meet Lizzie’s new friends, Marion and Colin, and read about a little harmless romance that springs up as they all try to keep up with the irrepressible Lizzie and her quest to find Willa. It’s a book about lying and spying and secret-keeping and persistence in a time and place where all of those qualities, even the dishonesty, are necessary for survival.

But the story never becomes too thoughtful or deep. It’s barely believable that Lizzie can get away with all of the shenanigans that she pulls. And Jakob seems too befuddled to be as intelligent as he’s supposed to be. Maybe he’s a bit of an absent-minded professor at the ripe age of nineteen. Anyway, it’s a lark, but not to be taken seriously. And the minor characters—Alan Turing, Dilly Knox, Gordon Welchman—as well as the setting provide a good introduction to Bletchley Park and its importance to the British war effort and eventual victory.

I recommend both books for those teens who are interested in World War II and Bletchley Park and codes and codebreaking. Oh, both books spend a fair amount time talking about codes and ciphers and Enigma and how it worked and how the Enigma code was broken? Or deciphered? I can never keep the difference straight in my head between codes and ciphers, much decode or decipher anything. But you may have better skills than I do.