"The Gravity of the Dark Nebula" is the nineteenth volume of the popular Japanese series "World Accelerator" by the legendary writer Reiki Kawahara. In this book, the main character is Haruya Kurebaya, a skilled fighter who finds himself in epic virtual battles. This time he has to face new enemies who threaten him and his friends. Haruya decides to defend the world of virtual reality and bring peace to a place where chaos reigns. "The Gravity of the Dark Nebula" is an exciting novel that proves that a real hero will always find the strength to win even in the most difficult situations.