Gundam SEED Doujin Fictions have a lot of popular works that you can refer to: 1. Gundam Seed: The Future War: The story of the protagonist, Yamato Kira, and the others in the future world. It portrays the battles between different forces and the complicated interpersonal relationships. Gundam Seed: The story of the main character in Gundam Seed traveling to the future, searching for his past and truth in the new world. 3. Gundam Seed Night God Moon: It tells the story of the protagonist's character in Gundam Seed. He discovers that he is not the protagonist of this world in his constant pursuit. 4. Gundam Seed Pseudomonogatari: A fictional story about the protagonist's character in Gundam Seed and others. It is a rather unique doujinshi novel. These are some of the more popular Gundam SEED Doujin novels, but there are many other works to choose from.