Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Completely inaccessible to non-PhD types

This book was featured in Business Week, where its very interesting premise, namely that there is just enough non-randomness on Wall Street to make money, was laid out. What Business Week fails to do is to inform the reader that, except for an interesting introduction, the essays are pure mathematics with no explanatory text for any but the cognoscenti. Lay readers beware!