Fictional novels are not registered as a trademark of any category. Fictional novels are a type of literary work that does not belong to goods or services and therefore cannot be registered as a trademark. If you want to protect the copyright of a fictional novel, you can register it as a copyright. The copyright could last for decades and continue after death. The type of registered fiction novel needed to be determined according to the specific content of the fiction novel. If the novel involves fictional elements such as characters, locations, and plots, you can consider registering it as a trademark or copyright. If the novel involved a certain business model or wanted to make it commercial, he could consider registering it as a trademark or patent.