Working on this book was a really great and interesting experience for me, full of brainstorming and emotions. All this would definitely be impossible without the help of certain people. This is the time to say thank you.

First of all, I would like to thank my parents, Olga and Alexander, for providing me with a happy childhood that shaped my future and my career.

I would like to thank my wife, Inna, for her patience, encouragement, and support during these tough times and throughout the process of writing this book.

I would also like to thank the entire team at Packt Publishing. These guys are doing really great work and making the world better. While I was in direct contact with some of the people who were working on the book, others stay unknown to me. I know that a lot of people spent a piece of their lives to make this book possible. Thank you all, guys!