Greg Egan writes hard science fiction built around mathematics, physics, consciousness and forms of intelligence very different from ordinary human experience. Permutation City explores simulated minds and digital existence, while Diaspora follows posthuman intelligences living in software polities and travelling through a universe governed by demanding scientific ideas. The Orthogonal trilogy imagines a cosmos with different physical laws, requiring its inhabitants to discover the mathematics of their own reality, and Schild’s Ladder begins from an experiment that creates a rapidly expanding new state of matter. Egan’s fiction is dense, rigorous and concept-first, often requiring close attention to scientific explanation. It is best suited to readers of hard SF, posthuman fiction, mathematical speculation and mind-bending cosmology. Read more Less