The plot of the book 'Казак в Аду' (The Castle in Andu) by Sergey Lukyanenko revolves around the theme of technology evolution and its impact on human society. The story takes place in a world where magic and technology coexist, and humans have developed a unique way of living in harmony with the technological advancements. The protagonist, a young man named Artem, discovers a mysterious castle in the middle of a dense forest, which is inhabited by a group of people who possess advanced technologies that have the power to manipulate reality. As Artem delves deeper into the castle, he realizes that the inhabitants are not just mere mortals but beings with extraordinary abilities, who have evolved beyond the limitations of human understanding. They have developed a personal paradigm for perceiving the technological process of developing modern knowledge, which has allowed them to transcend the boundaries of human existence. The castle is a symbol of their achievement and represents the pinnacle of technological advancement.

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