Another really solid book in this series. The main reason I did not give it 5 stars is that I was able to predict the ending on several points. As of this book, my favorite of the series is probably the second book. Still, despite the predictability (or strongly foreshadowing?), I still enjoyed this book and I continue to love this family of spies. One of the things that would make it better is if the kids were to age from book to book, but from what I can tell, Brooklyn is still 12, the same age she was in the first book and the others are the same age as well. Allowing them to age would also help them show a bit more growth over the course of the books. This one took place in Scotland, their home base and where Brooklyn has to take summer school, Russia, and China. I enjoyed the cryptography part of this and how it took several of them to puzzle out the code. Overall, I'd say this was a very solid story and if you liked the first two books, you'll likely enjoy this adventure as well. I'm already anticipating the fourth book!
This book is being released on February 1, 2022. I received an advance review copy from NetGalley for free, and I am leaving this review voluntarily.