Book Pang, B., & Lee, L. (2006). Opinion Mining and Sentiment Analysis. Foundations and Trends® in nformation Retrieval, 1(2), 91–231 Focus is on methods that seek to address the new challenges raised by sentiment aware applications, compared to those that are more tradiontal fact based analysis. We include material on summarization of evaluative text and on braoder issues regarding privacy, manipulation, and economic impact that the development of opinion-oriented information access services gives rise to. Also discussion on resources, benchmark datasets, and evaluation campaigns.