alien-invasion artificial-intelligence bestseller chinese-history chinese-literature communication-with-aliens cultural-revolution dark-forest-theory extraterrestrial-intelligence fiction game-theory general hard-science-fiction military-strategy newyorktimesbestseller nyt:trade-fiction-paperback=2020-09-27 physics science-fiction sciencefiction space-exploration speculative-fiction technology the-remembrance-of-earths-past virtual-reality