There were many reasons why a novel could be published by so many publishing houses. The following are some possible reasons: 1. The genre and theme of the novel: Different publishing houses may like different types of novels such as romance novels, science fiction novels, horror novels, historical novels, etc. The publishing house might also like different types of subjects such as love, war, science fiction, suspense, and so on. 2. The popularity and popularity of the novel: If a novel is very popular, the publishing house is likely to publish it and expand its influence. This way, more readers would have the opportunity to read the book and promote its sales. 3. Market competition among the publishing houses: Competition between the publishing houses may lead them to release more similar novels. For example, a publishing house might release a popular novel, and then other publishing houses would follow up with similar novels to compete for readers. 4. The publishing policies and fees of the publishing house: The publishing policies and fees of the publishing house may also affect the situation of a novel being published by multiple publishing houses. For example, some publishing houses might charge publishing fees while others might lower their fees to attract more novels.