Instruct: Classify a review into positive or negative sentiment.
Query: Most enjoyable book I've read in the past year

Brett Stuart's comments below describe this wonderful book perfectly. I'm sorry that the entire New York Times Book Review piece by Kennedy was not included--his more extended review was equally enthusiastic. I can only add that Robert's literate writing style is a pleasure to read--one feels engaged in a fascinating conversation with a cultivated, thoughtful man who wears his erudition easily. For the most part, he is dispassionate in his descriptions, accurate in his judgements, and innovative in his intepretations of the large trends that have emerged over the past 100 years. A must read, in my opinion.