Sword Art Online, the gaming world that the main character Kirigawa Kazuto is trapped in. 10,000 players stuck in a rpg game try to clear the 100 floors of Aincrad. If you die in the virtual world, you also die in the real world. Sword Art Online is the best RPG novel you could ever find written on the internet.
After watching the anime based on the light novel, I could not restrain myself from knowing the full story of Kirigawa Kazuto and the character he created for himself in the virtual world inside the gaming device, Nerve Gear. After starting this awesome novel, I could not put this light novel down until I finished it. Even though the main character is over-powered, he has some weaknesses that make him into a better character as a whole. Self-survival, friendship, love. All these things affect Kirito's life as he strains to clear the progressing floors. The imagery. The dialogue. The plot. The characters. All of these that Kawahara expressed within his light novel allow you to fully enjoy the characters as they go through the life forced upon them through an RPG.
The romance within this novel is not just words on a page. You grow to love both Kirito and his loved one, Asuna. The love of these two has no bounds, in SAO. Together they are unbeatable. As their love grows, the events within this virtual reality get harder as they are pulled apart because of certain other characters like Heathcleff and Kuriass. The final scene, heartbreaking as your eyes think they're going to both die in the disappearing world, even though your mind tells you otherwise. Overall this was the best book I've read that's transformed into an anime.