In the midst of the Chinese Cultural Revolution, a young scientist sends a message into the cosmos that brings a desperate, far more advanced civilization hurtling toward the Earth, and humanity begins planning for a Doomsday Battle that won't happen for four hundred years. There are a million reasons to love Liu's storytelling in this first book of his Three-Body trilogy, but his ability to keep the pace and tension humming while also keeping the aliens almost entirely off-stage utterly blew my mind.