The main character, a young man named Ivan, discovers an old but strong book that contains the secrets of the past and the key to understanding the technological process of developing modern knowledge. He embarks on a journey to find other survivors and share his newfound knowledge with them, hoping to unite them against their common enemy - a powerful warlord who seeks to control the remaining resources. The plot of the book 'Старый но крепкий' revolves around the theme of technology evolution and its impact on human society. In a post-apocalyptic world where all advanced technologies have been destroyed, the survivors are forced to rely on basic tools and weapons to survive. The protagonist, Ivan, discovers an old but strong book that holds the secrets of the past and the key to understanding the technological process of developing modern knowledge. This discovery sets him on a journey to find other survivors and share his newfound knowledge with them, in the hope of uniting them against their common enemy - a powerful warlord who seeks to control the remaining resources. As Ivan travels through the ruins of the once-great civilization, he realizes the importance of studying and understanding the process of technology evolution. He learns how the development of modern knowledge has been shaped by the need for survival and the desire for power.

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