As a fan of novels, I don't have the ability to update the Doujin novel rankings in real time. However, I can tell you some common types and characteristics of Doujin novels to help you better understand the creation and popularity of Doujin novels. Doujinshi was a type of re-creation based on the original work (usually manga, animation, game, etc.). There were often different versions of the work, such as sequels, adaptation, and derivative works. Doujinshi novels were usually based on the world view, characters, plot, and other elements of the original work. The inspiration came from the author's personal hobbies, experiences, and cultural background. Doujinshi's popularity varied according to the genre, author, platform, and other factors. Some of the popular Doujinshi novels, such as Original Gods, Marvel, and Game of Thrones, usually had a large fan base and high popularity. Doujinshi novels usually required the author to have a certain level of knowledge about the original work and creative ability. At the same time, the author needed to have a deep understanding of the readers 'needs and preferences in order to create an attractive work.