This question could be answered from many angles. Language and cultural differences: foreign literature and Chinese literature have different language and cultural characteristics, which may lead to different lengths of books. Foreign literary works often need more vocabulary and grammar to express thoughts and emotions, so they may be longer. In addition, the reading experience of foreign literature might be different from that of Chinese literature. Chinese literature tended to pay more attention to plot and character creation, while foreign literature paid more attention to expressing ideas and philosophical views. 2. Writing style: The writing style of foreign literature is also different. Some make the books more complicated and fulfilling. This might cause the length of the book to increase. 3. Market demand: The reason why modern foreigners write longer books is probably due to market demand. Some readers might want to read more in-depth and complex works to satisfy their reading needs. The length of the book may reflect the author's response to the reader's needs. In short, the increasing length of books written by modern foreigners may be the result of a combination of factors such as language and cultural differences, creative styles, and market demand.