"The Reality Dysfunction" is a science fiction novel by Peter F. Hamilton, published in 1996. It is the first book in the Night's Dawn Trilogy and is set in a future where humanity has colonized various planets. The story explores themes of technology, spirituality, and the nature of reality as it follows multiple characters facing a mysterious and dangerous force. The plot centers around the emergence of a malevolent entity known as the Reality Dysfunction, which threatens the fabric of existence. As characters from different backgrounds and worlds come together, they must confront their beliefs and the consequences of their actions in a universe where the boundaries between life and death blur.