"Reality Dysfunction" is a science fiction novel by author Peter F. Hamilton, published in 1996. It is the first book in the Night's Dawn Trilogy and explores a future where humanity has colonized various planets. The story delves into themes of technology, spirituality, and the nature of reality, as characters face a mysterious force that threatens their existence. The plot centers around a conflict involving a powerful, malevolent entity known as the Dark, which emerges from the afterlife. As the characters navigate this crisis, they confront moral dilemmas and the implications of their actions, leading to a complex narrative that intertwines multiple storylines and perspectives.