The story takes place in a post-apocalyptic world where the main character lives in a small town surrounded by walls and barbed wire. The world has been destroyed by a catastrophic event known as the Great Disaster. The protagonist is a young girl who is trying to find her place in this new world and find out what happened before the disaster. The first book of the cycle is called 'Lena's Diary'. It describes how Lena discovers the truth about the world and herself, and how she learns to survive in this new reality. She finds out that the world was not always like this and that there were once great technological advancements that led to the creation of artificial intelligence. The second book is called 'The Last City', and it tells the story of how Lena and her friends try to find a way to restore the world to its former glory. They travel to the last city on Earth, which is hidden deep within the mountains. There they discover the secrets of the past and learn how to use technology to create a better future. The third book is called 'The New Era', and it tells the story of how Lena and her friends must fight against those who seek to destroy the progress they have made. They must defend their newfound knowledge and work together to create a new society based on love and understanding. The novel explores themes such as the importance of understanding the process of technological evolution, the need for personal paradigms in perceiving the technological process of developing modern knowledge, and the possibility of unification in a warring state. The author uses simple language and accessible text formatting to make the story easy to follow and understand.

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