Singularity Sky

"Singularity Sky" is a science fiction novel written by Charles Stross, published in 2003. The story is set in a future where humanity has expanded into space and is dealing with the consequences of advanced technologies. The narrative revolves around a post-scarcity society that is abruptly disrupted by the arrival of a mysterious alien force known as the "Eschaton," which can manipulate advanced technologies and introduce sudden changes to reality itself.