"Sine Qua Non" is an exciting book in the genre of science fiction, written by the talented writer John Smith. In this book, visit an ultra-modern world where reality is intertwined with virtuality, and humanity is forced to face its own moral principles. The main character, programmer Max, finds himself in the middle of a game world where every move can lead to a life and death decision. Will he be able to find a way out of this virtual trap and save his essence? "Sine Qua Non" is an exciting journey into the future, where every action has its consequences, and threat and opportunity are an inseparable part of existence.