Bo Pang and Lillian Lee Foundations and Trends in Information Retrieval 2(1-2), pp. 1–135, 2008. Also available as a book or e-book. http://www.cs.cornell.edu/home/llee/opinion-mining-sentiment-analysis-survey.html The monograph itself: published version authors-formatted version: slight differences from the final print version: copy-editing and typesetting changes (print version has one known int