"If you're looking for a challenging quiz book that is a little different from the others available, then I'd highly recommend DECIPH3R. It is a work in progress for me, but one I'll keep coming back to. Very well set out with QR codes that take you to a page where you can submit your answers, this page also tracks your progress."
- Noah Hart Verified Amazon review"I've only had this for a couple of days, but I am really enjoying it. I discovered puzzle books by starting with name elimination books, but they all seem to be the same and mostly just involve crossing out page after page, after page. This book is completely different. A wide variety of puzzles (that require you to put your 'thinking cap' on). Codes, ciphers, logic puzzles, and more."
- Darlene E. Verified Amazon review"I've had this book for some time now. On one hand, I am amazed that the creator of this book has come up with 50 different puzzles. It sometimes felt like it was more of a peak into his mind. Most of the puzzles, you could come up with the mechanism to solve. Other times, it felt extremely random, which is why I put this at 4 stars. I am also amazed that there appears to be 2 more of these books coming to us in the future. I will still purchase them, now that I have a little grasp on the style. Also, don't be afraid to use Google, as some ciphers I would have had no idea how to use."
- Amazon Customer Verified Amazon review