The question of which novel is the most popular is difficult to answer because every era has the most popular genre and subject matter, and readers 'interests and preferences are constantly changing. However, according to the current trend of the online literature market and the preferences of readers, the following are some of the most popular novel types and topics: 1. Fantasy novels: Fantasy novels usually involve elements such as magic, martial arts, and mythology. They are one of the most popular types in the online literature market. 2. urban novels: urban novels usually describe the life and workplace experiences of modern people, including love, marriage, entrepreneurs and other topics. 3. Science fiction: Science fiction usually involves future technology, alien creatures, and other topics to let readers feel infinite possibilities and imagination. 4. Historical novels: Historical novels usually use historical events and characters as the background to describe their fates and experiences. Romance novels: Romance novels usually describe love stories that make readers feel romantic and sweet. Of course, these types and topics were not static. The interests and preferences of readers were constantly changing, so they wrote better works to meet the needs of readers.