The Codebreaker Girls is less about the title of the book than the subtitle: "A totally gripping WWII historical mystery novel." The main character, Rosie Sinclair, is a thespian turned military driver and mechanic during World War II, not a codebreaker, officially at least. Of course, she sets about to solve at the murder of beloved Professor Hale, who heads Cottisbourne Park, which now houses the codebreakers in a round the clock battle to save Britain from Hitler. Hale at first was thought to have shot himself, but when the facts don't add up, Rosie and the newly arrived Major-General "Bluff" Kingsly-Flynn join forces to figure out who murdered Hale. The codebreaking we get as readers is largely Rosie's ability to reassemble codebreaking equipment, just as she has been putting together an old Citreon in the Park's barn. What we have is a romance that emerges between a young woman and a mature military officer as they work together to solve a riddle. I can find fault with some technical writing errors and the fact that the book and its cover have little to do with each other, but the story is fun, moves quickly, has charm and a bit of danger. It's wartime lite--comedy, mystery, love, and a little codebreaking on the side. Frankly, I could not put it down.