Sci-fi books suitable for 6th graders usually contain interesting and imaginative topics such as time travel, aliens, the future, and so on. The following are some science fiction recommendations for the sixth grade: "The Galaxy Empire"(Isaac Asimov): This is a classic science fiction novel describing a future Galaxy Empire, as well as the political conspiracy, technological advancement, and human destiny surrounding it. 2 "The Three Bodies"(Liu Cixin): This is a Chinese science fiction novel that has won many awards. It tells the story of the contact and conflict between humans and alien civilizations and probes into the fate and future of mankind. 3 "Wandering Earth"(Liu Cixin): This is a Chinese science fiction novel about the end of the Earth. It tells the story of the extreme measures taken by humans to save the Earth and the story that happened in the process. The Martian Rescue (Andy Will): This is a story about how a Mars explorer survived and sought rescue in an extremely harsh environment after being abandoned on Mars. 5 "Time Machine"(Herbert George Wales): This is a classic science fiction novel about a scientist who invents a time machine to travel to the future world to explore the fate of mankind and the mysteries of the universe. These sci-fi novels had interesting storylines, deep thoughts, and imaginative topics suitable for sixth graders. Of course, which book to choose depended on the child's interest and reading level.