I posted before about the Elliott Wave Principle and several books dealing with the subject. However, I feel the need to reiterate the importance of two books by Robert R. Prechter, Jr. They are: The Wave Principle of Human Social Behavior and Pioneering Studies in Socionomics. I purchased both these books in a two volume collection called, Socionomics: The Science of History and Social Prediction. In all my studies as an undergraduate and graduate student in the field of finance and mathematics, not one professor has ever mentioned Prechter or Elliott.