Good 1970s SF read. It had the usual 1970s SF critiques of overpopulation and rampant capitalism. I liked the characterization of the world; It has mysterious alien technology and artifacts, soylent-green style food of the future, and computerized Freudian analysis. I found the characters relateable, especially in their economic plights. Even though they are surrounded by ancient wonders created by incredibly advanced alien technology, most of the characters are still caught in a rat race, trying to earn enough to pay for food and oxygen.