If the author has already made it clear that he cannot continue writing his work, then continuing his work without authorization may constitute copyright violation. This is because in copyright law, the author owns the copyright of the work and shares it with the whole world. Only under certain conditions can the author transfer the copyright to others. Unauthorized continuation or adaptation of his work may violate the author's copyright. Although the author may not object to other ways of exploiting his work, such as adaptation or continuation, if these methods are not explicitly approved by the author, it may constitute copyright infringement. Therefore, if you continue to write a work without authorization, it is best to obtain the author's permission or avoid copyright infringement.