Book excerpt: In this book, ZOO, the author, Bernard Livingston will present a study of this world which treats it as social history. But the style will be a light-handed one similar to that of his previous social study, Their Turf, the story of the world of the racehorse and the people involved therein. It is to be hoped that the fun, drama, humor and yes, enlightenment inherent in the world of the zoo will not be lacking in this work.