The definition of a good book varies from person to person, but generally speaking, a good book should have the following characteristics: 1. The content is valuable: the content of the book should be able to inspire the readers to think and help them broaden their horizons and improve their cognitive level. At the same time, the content of the book should also be in line with the interests and needs of the readers, so that the readers would feel happy and gain something. 2. Beautiful writing: The writing of a book should be beautiful and smooth, so that the reader can feel the joy of reading. At the same time, the text of the book should be clear and easy to understand, avoiding using overly professional terms and language. 3. Profound thoughts: The thoughts of the book should be profound and have content that can make the reader think about life and reflect on society. At the same time, the ideas of the book should also be enlightening and guide the readers out of the predicament and confusion. 4. Rich content: The content of the book should be rich and colorful, covering various fields and topics. At the same time, the content of the book should be continuous and coherent so that the reader can obtain comprehensive knowledge from it. A good book should be a work that could inspire the readers to think, improve their cognitive level, write beautifully, and have deep thoughts. The readers could choose the books that suited them according to their interests and needs.