Online novels had a wide range of topics. The following were some of the more popular topics: Fantasy: Fantasy novels mainly describe the struggle and cooperation between humans and mysterious forces. They often involve elements such as magic, martial arts, and mythology. 2. Metropolis: Metropolis novels mainly describe the life, emotions, and career stories of contemporary urban people, including the workplace, love, marriage, family, and other topics. 3. Science fiction: Science fiction novels mainly describe the exploration and adventures of human beings in technology, biology, space, and so on in the future or in the past. 4. History: Historical novels mainly tell stories about specific historical periods, including historical legends, wars, politics, and other topics. Fantasy: Fantasy novels mainly tell stories about myths, legends, magic, and other elements. They usually have some connection with history or modern life. These are just some of the more popular online novel topics. In fact, online novels have a variety of topics, and every author has their own writing style and preferences.