This middle grade novel was the first book I've read by Ruta Sepetys but it will not be my last. I loved her writing style. I loved how she wove real-life code breakers like Alan Turing, Gordon Welchman and Dilly Knox into the story with her fictional characters of siblings Jakob and Lizzie and their friends. I'm not a big nonfiction reader, but I really enjoy learning about the work that was done at Bletchley Park during WWII so reading this book was both entertaining and educational. I really loved Lizzie - she is smart and independent, determined and spunky. This book has a strong focus on family - both biological and found. As Lizzie says - "Friends are like family. And sometimes the families we build are just as strong as those we're born into."

A marvelous historical mystery. Bletchley Park and the Enigma code is fascinating all on its own as history. A mystery with more codes, great characters, a well realized setting, humor and excitement, and this book is a delight. Jakob and Lizzie are living in Britain during WWII. Jakob is working at Bletchely Park helping to solve the Nazi's coded messages in order to defend Britain. Their mother went to Poland to help clear out the American Embassy there, right before the Nazis invaded, and then she vanished. Lizzie is determined to find out what happened to her, while avoiding being sent to America where she will be safe from the German bombs. I highly recommend this book. Advance copy read on NetGalley.

I received an ARC of this book from NetGalley in exchange for an honest review.

When I saw that two of my favorite authors had come together to collaborate, I couldn’t wait to read this book! I was not disappointed. I read a lot of WWII historical fiction and the history in this story surprised me. I really enjoyed it!

As with all of Ruta's books, this is detailed, researched, and oh, so interesting! The author is a genius at using fictional characters to bring history to life. The surprises, the hope, the story! The characters are rich and the history ... accurate and a story not very well-known.

If you love spies and adventure, this book is a story of hope emerging from history.

Thank you Net Galley for the ARC!

This was just what I expected from a Sepetys/Sheinkin collaboration. Lots of great, detailed historical information woven seamlessly into an exciting fictional story. Although both main characters are teenagers, this felt a bit more middle school/lower-YA than Sepetys's other books, and I actually really appreciate that. I feel like middle school-aged students don't have as much geared towards them. So much is either too babyish or too mature and this hits the just right sweet spot.

A breathtaking MG story of code breaking, war secrets, and the search for a missing mother in England during WWII. Captures the era beautifully while giving us a smart inquisitive brother-sister team as protagonists. Loved it!

With a few exceptions, I do not do well with multiple POVs. When the multiple POVs are also written in present tense, the book is certainly not one that I can read.

A lovely historical fiction that tells the story of Bletchley Park and the Enigma during WWII. Siblings Lizzie and Jacob are both wonderfully well rounded characters and the story is captivating. Excellent read.

The Bletchley Riddle was such a fun book to read. Told from dual points of views of a brother/sister team, it was set in England at the beginning of World War II at Bletchley Park. Brother was on the enigma team, sister was a determined, curious girl who found answers without asking the questions. Together, they were determined to figure out what happened to their missing/presumed dead mother. What they uncover is a little known piece of history that was integral to winning the war.

The Bletchley Riddle is great for middle grades on up. It is an easy, squeaky clean, delightfully written adventure. I'm looking forward to adding it to my school's library.

I received an advance reader copy for free, but all opinions are my own.