The book "All cats are gray" by the famous American writer Andre Norton is an exciting science fiction novel that transports the reader to the future, where humanity has long deserved the expansion of galactic civilization. However, mystery and danger shadow this world, and an archaeologist from the terrestrial planet, who turns out to be the key to overcoming threats, finds himself in the very center of events. "All cats are gray" is a book marked by the author's vivid imagination, significant moral issues and an exciting storyline that will leave you on the edge of the world.