"The Kill Order" by James Dashner is a prequel to the popular "Maze Runner" series, set thirteen years before the events of the first book. The story follows a group of survivors in a post-apocalyptic world, ravaged by a deadly virus called the Flare. Mark and Trina are among the few who have survived the virus and are struggling to find a way to stay alive in a world that has been torn apart by the pandemic. As they search for food and shelter, they encounter a group of strangers who may hold the key to the origin of the virus and the reason behind its release. Along the way, they must confront dangerous obstacles and make difficult choices as they fight for their survival and the future of humanity.