Would it be illegal to continue writing someone else's novel? Would it violate the copyright of the original author?

It was legal to continue writing someone else's novel if it was in accordance with the original author's wishes and authorization and did not violate the original author's copyright. However, if you modify the original content without authorization or use the original author's copyright material for commercial use, it may constitute an act of copyright violation. It was best to contact the original author to obtain authorization or obtain permission through other legal means before continuing the novel. Without authorization, the author must abide by the relevant provisions of the original author and the copyright law. The novel must not be modified, published or distributed without authorization. It should be noted that even if you were authorized to write a follow-up novel, you still had to abide by the relevant copyright protection terms. For example, the content of the follow-up novel must be the same as or similar to the original work. It must not exceed the scope of the original work, nor can it change the theme and plot of the original work. At the same time, the continuation of the novel also had to follow the wishes and style of the original author. It could not maliciously slander, tamper with, or insult the original author's work. Therefore, the continuation of the novel needed to be carefully handled to avoid violating the copyright of the original author. At the same time, it could also provide more possibilities for the creation of original literature.