Introduction

I have prepared this book because I love maths and puzzles. I also love the creativity of Zbigniew Nienacki, J. K. Rowling and Dan Brown.

There is also another reason.

A peculiar puzzle exists in our world. It is around 30 years old and officially not solved yet, despite the fact that thousands have tried. I would like to draw a little bit of your attention to it.

I want to give you some quite interesting information, gradually – piece by piece. There are reasons for doing it this way. I do not want to spoil the fun. I will explain everything when the time is right.

I have been thinking about creating this book for a long time. I wanted to create a type of book that has never been crafted before - I am not talking here about the plot perspective.

I was told that "it cannot work", "books are dying in the era of smartphones" and "it makes no sense".

I have tried to draw other authors` attention but I have encountered impassable walls. Finally I made a decision.