What is the reality dysfunction?

"The Reality Dysfunction" is a science fiction novel written by British author Peter F. Hamilton. It was first published in 1996 and is the first book in the Night's Dawn trilogy.

The novel is set in a future where humanity has colonized other planets and developed advanced technology. However, a mysterious phenomenon known as the "reality dysfunction" begins to occur, causing people to reanimate after death as malevolent spirits known as "possessors." These possessors can take over the bodies of living beings, leading to chaos and destruction.

As the reality dysfunction spreads, various characters from different parts of the galaxy must come together to uncover the truth behind the phenomenon and find a way to stop it before it destroys everything. The novel explores themes of human nature, sacrifice, and the consequences of advanced technology.

"The Reality Dysfunction" has been praised for its intricate world-building, complex characters, and gripping plot. It is considered to be a seminal work in the space opera genre and has gained a large following among science fiction fans.