Changing someone else's TV series into a novel without permission might constitute an copyright violation. This was because TV series and novels were two different forms of creation. After being adapted into a novel, it had to comply with the relevant provisions of the copyright law. Those who created works under the copyright law enjoyed copyright, including the rights to adapt, translate, and continue writing. If you adapt someone else's work into your own work without the permission of the copyright owner and publish it publicly, it may constitute copyright violation. In the process of adapting a TV series into a novel, if the plot, characters, scenes, etc. of the TV series were transplanted or deleted without authorization, or if a large number of plots were fabricated, it might constitute an copyright violation. In addition, if the content of the novel was too similar to the TV series, it might also lead to copyright violation. Therefore, when writing a novel, it was best to abide by the relevant provisions of the copyright law, respect the intellectual property rights of others, and avoid copyright infringement.