The novels in the Sword and Sword Realm could be divided into three main series: 1 Sword Art Online This was the first novel in the series, which told the story of the main character Kirito and the other characters 'adventures in a virtual reality game world. The series was very popular and had been translated into many languages. Many novels and animations had been released. 2 Faster than Light This was the second part of the " Sword Art Online " series, which told the story of the main character, Kirito, and the other characters 'adventures in a virtual world called " Acceleration World." Like the first one, this series was also very popular and translated into many languages. 3. Tokyo Ghoul This was the third phase of the " Sword God Realm " series, which told the story of the protagonist Kim Mu-yan's survival and struggle in a virtual world that was regarded as a " bastard " by humans. This series was similar to the Sword and Sword Art Online series, but there were also some differences, so it needed to be read separately. The order of reading the " Sword Art Online " series should be to read the first book in the " Sword Art Online " series, then read " Acceleration World " and " Tokyo Shika." This way, he could better understand the development of the story and the relationship between the characters.