Here are some recommendations for e-books about life's ups and downs or social changes: 1 Alive-Yu Hua: This is a famous novel about the life experiences of a Chinese farmer, reflecting the major events in the history of Chinese society and the sufferings of the people. This book profoundly reveals the complexity of human nature and the variety of society, which is worthy of readers 'deep thought. 2 The Little Prince-Antoine de Saint-Exupéry: This is an eternal fairy tale about a little prince who set off from his own planet, experienced many adventures and explorations, and finally returned to his own planet. This book shows the essence of human life and society through a child's perspective, and also reveals the true meaning of life. 3 " Relieve the Worries "-Keigo Higashino: This is a very touching novel about the story of a grocery store owner who solved people's psychological confusion. This book is full of warmth and wisdom, which makes people deeply aware of the complexity of human nature and the variety of society. At the same time, it also inspires people to cherish their feelings and lives. 4 " Three-Body "-Liu Cixin: This is a famous science fiction novel about the war and conflict between the Earth civilization and the Three-Body Civilization. This book reveals many of the problems facing humanity, including the complexity of alien civilizations, science and technology, and human nature. It is highly thoughtful and profound. These e-books were excellent works that could allow readers to understand human nature and the variety of society in depth, and at the same time, inspire readers to think and feel. I hope you will like any of them!