" Sword Art Online " was a science fiction novel created by the Japanese light novelist Kiriyu Tantan. The background of the story was a virtual reality game world. The protagonist, Kirito, was a game developer who experienced various adventures and challenges in the game. The novel was first published in 2008 and has since become a popular classic science fiction novel. It has been adapted into comics, animations, games, and other forms. The Sword and Sword God Realm was loved by readers with its fascinating plot, beautiful graphics, and rich character settings. If you like science fiction and virtual reality games, then this book will definitely make you hooked. Of course, everyone's preferences are different. If you are interested in this book, I suggest you read it yourself to experience its charm.