Copyright law usually protects the rights and interests of original works, including novels, essays, poems and other literary works. The original author has exclusive rights to copy, distribute, display, modify and extend his works. Continuing to write novels without the consent of the original author may infringe on these rights, which is an infringement.
Continuing to write a novel involves the extension and development of the original plot, characters and structure, which may have an impact on the original author's creative intention and the dignity of the work. Therefore, when continuing to write, we should respect the rights and interests of the original author and get his permission or authorization as much as possible.
However, in some cases, it may be regarded as a reasonable continuation behavior. For example, according to the principle of "fair use" in the copyright law, it has not adversely affected the core creative part of the original work.
The best way is to communicate with the original author as much as possible, get his authorization or permission, and then continue writing. This can protect their legitimate rights and interests and avoid infringement disputes.