The New York Times Best-selling fantasy author Anne Bishop makes her U.S. debut in science fiction with this engaging futuristic novella. The Restorers travel the universe fulfilling a purpose handed down through the generations. They live and die aboard city-ships, never knowing the worlds they create and save. What begins as a disastrous training exercise in creating and balancing ecosystems becomes an unexpected fight for survival. The only hope may be the secret project of an untried Restorer.