A novel could be published by multiple publishing houses, depending on the genre, theme, style, and so on. For example, a simple teenage novel might be published by multiple publishing houses at the same time, while a popular fantasy novel might be published by multiple publishing houses separately. Different publishing houses may make different adjustments to the cover, pricing, sales channels, etc. Therefore, a novel may be published by multiple publishing houses, and the novels published by each publishing house may have different content, style, and reader groups.