1. The content quality is not high: if the content quality of the book is not high, readers may have little interest, resulting in low sales and low input value. The low quality of content may be manifested in outdated content, unsystematic content and no innovation.
2. Fierce market competition: When the competition in a certain kind of book market is fierce, homogenization is widespread. If the book is highly similar to other similar books in content and style, readers may choose other books with more characteristics and attractiveness.
3. Improper marketing strategy: book sales not only depend on the quality of content, but also include promotion and price strategy. If the book is improperly promoted or overpriced, readers may not be interested, which will affect sales.
4. Poor translation quality: For translated books, translation quality is one of the important factors that affect readers' acceptance. Poor translation quality, such as poor translation accuracy and poor language expression, may make readers lose interest in books.
To sum up, the low value and durability of books may lie in problems in content quality, market competition, marketing strategy and translation quality. But the specific situation needs to be analyzed according to the specific book and market environment.