Adrian Tchaikovsky's science fiction novel spans millennia to tell the story of two civilizations on a collision course: the last remnants of humanity fleeing a dying Earth, and an entirely new species that has inherited a terraformed world meant for human colonization. The novel alternates between the human ark ship Gilgamesh, carrying colonists in frozen sleep toward their promised paradise, and the planet below, where an engineered nanovirus has uplifted spiders to intelligence. Tchaikovsky devotes equal attention to both storylines, creating a genuinely alien spider civilization with its own culture, conflicts, and technological development. The spiders' sections are remarkable for making arachnid cognition and social structure comprehensible without anthropomorphizing. As the human ship deteriorates across centuries and the spiders develop their own science and culture, the novel builds toward an encounter between species with radically different ways of understanding reality. Tchaikovsky, a trained zoologist, brings scientific rigor to his speculation about how spider intelligence might differ from human minds. The book won the Arthur C. Clarke Award and launched a series continuing this exploration of post-human futures. For readers interested in science fiction that takes both hard science and philosophical questions seriously, this novel offers ambitious speculation about what intelligence and civilization might look like beyond human limitations.