Doujinshi referred to derivative works based on a specific work. Due to the copyright protection of the original works, many doujinshi novels are not authorized, so there may be situations where the entire copy cannot be found. However, doujin novels had a certain market as a form of literature. Some authors would add elements of the original novel to create their own doujinshi works. These works may not be entirely based on the original works, so there may be disputes over copyright. If you can't find a complete Doujinshi novel, you can try searching on some Doujinshi websites or platforms or contact the author or copyright owner to ask if you have permission to use the work. At the same time, you can also try to use some free online reading software such as Tangyuan Creation, Fast Reading, etc. to read some authorized doujinshi novels.