This is a quick puzzle book that has a good variety of easy to hard. It doesn't have a lot of pages but it looks like it would be a nice distraction for traveling/commuting.

This is a fun puzzle book which has varying levels of puzzles -- for some people, hard, and for other people, easy. I have had students which could have handled this at a young age, and others that wouldn't be ready for it even when much older; it really depends on their experience with puzzles. So, be aware that people of the same age could find this either frustrating or delightful, or even too easy.

Challenging, entertaining, and infinitely capable of making the reader feel like a huge dummy; also serves to illustrate the massive brain power Britain assembled at Bletchley Park during WWII. I recommend but be prepared for some serious humbling.

A lot of fun to try to solve these challenging little puzzles. I will definitely buy this for our library, if and when it becomes available in the US!

I love this! I know several people who'd enjoy it, too, so these will make nice Christmas gifts. The puzzles in this book range from fairly simple to devilishly difficult. They're also quite varied in style, some being visual, some language- or math-related, etc. I think any puzzle lover would find challengers here.

#NetGalley

A good companion during the time of commuting or travel for vacations. The level of different and very creative. Also, I recommend the digital version because it simplify the way to display the solutions.

This puzzle book requires spatial, logic and some mathematical skills to do. As with most puzzle books it puts the puzzles in the typical 'easier to harder' order.

Good things to know about this book:
- There are only 25 pages of puzzles, the last 10 or so pages are the solutions to the puzzles.
- There are no 'real' war time puzzles in here. Just ones that are like the kind of puzzles the code breakers from WWII would have been able to do
- Anyone that is decent at puzzle solving or has an affinity for it may not find this book all the challenging. Those with less time in on puzzle books and work may find it more satisfying.
- This is not a book suitable for Mensa or higher IQ folks. They are likely to find it quite easy.

I enjoyed this puzzle book. They were all either easier for me or right at my max level of difficulty desired. I only gave up on one of them after a couple days and looked at the solution. Once seeing it I realized that I had the wrong perspective (which is typical) of how to solve the puzzle in the first place. I was expecting these to be a fair bit harder and so that is my reason for only 4 stars. When you advertise a book as a cursory to cryptography and in relation to WWII code breaking people are likely to have some high expectations on the difficult of the puzzles.

If you're going to be taking an IQ test in the future this is a good little book to use as a 'study' piece. Many of the puzzles at the beginning of this book are similar to ones on IQ tests I have done or seen. And keep in mind it's more important that you be able to describe how to solve the puzzle; even if you peek at the solution. Understanding the logic is more than half the battle with these types of brain teasers.

Please note: I received an eARC of this book from the publisher via NetGalley. This is an honest and unbiased review.

Very brilliant book of puzzles. After watching The Bletchley Circle tv series, I was obsessed with codes and ciphers. This book has some very tricky puzzles that are designed with incredibly intricate number patterns that are fun to try to solve, as well as an answer with full explanation (love this aspect). While I may not have natural coding abilities, I feel like doing these types of puzzles can help train your brain to notice more details in everyday life. Highly recommended.

I found myself with two puzzle books to review this month, and found it interesting to contrast them. The first is Mystifying Mathematical Puzzles by Joseph S. Madachy, and the second is Bletchley Park IQ Puzzles by the Bletchley Park Trust. Mathematical Puzzles treats a wide variety of interesting numerical pattern investigations, topology, geometry, as well as word arithmetic, logic puzzles, and quite a bit of miscellaneous. There is really something here for every interested student of mathematics (I’m much more fond of algebra than geometry for example…) Bletchley Park IQ Puzzles doesn’t limit itself to mathematics, but many of the pattern investigations are mathematical in nature. These are a great set of complimentary books for the thinker who is looking for hours of puzzling entertainment.

This was a fun little brain teaser. Visual logic and number puzzles, some were fairly easy, some were so complicated that I am wondering who can solve those (the number-thingis). They are in Levels 1 to 10, but even though I got some of the Level 2s already wrong I could still solve Level 10s, thus was able to enjoy the whole book. In the ebook version is a link after every puzzle that brings one to the well explained solution, and from there back or on to the next puzzle, which made for easy reading.

Highly recommended for brainiacs.

Not the easiest of puzzles, as you would expect, but good fun all the same. Downside is it was over too quickly.

I requested this book to review since I had just watched The Imitation Game a few days ago and learned about Turing, the Enigma machine, and Bletchley Park. Then I realized my brain just doesn't work for puzzles! I laughed at how many wrong answers I got, but I think this is a great book for puzzle-lovers. I'll stick to word searches.

What a fun book! For anyone who enjoys puzzles, you will find this an interesting mix of puzzles that increase in difficulty as the book progresses. I like that in the ebook, you can click on a link to take you directly to the solution, and go back and forth as often as you need to understand why the answer IS the answer!! The ability to do that, rather than having to go to a separate section of the book to look up the solution, is much appreciated.

This will provide hours of fun and some puzzlement as well!

Thanks to NetGalley and Bletchley Park Trust for allowing me to read and review this book. All opinions are strictly my own.

I love the e-version of this book, the way the answers are revealed. The problems we had to solve were for some easy, for others, impossible to solve and I had a lot of fun trying to figure out the answer.