Instruct: Classify the given review into positive or negative sentiment.
Query: Too hard to separate fact from fiction

First of all the formulas on the cover aren't even accurate. They're written like you would in grade school math class--even by the time you are in high school you wouldn't present them this way.I also find it untenable that he doesn't separate speculation from fact in the biographical research. Extrapolating their thoughts is one thing, but you have no place to draw the line between the information he has researched and what he imagines happened.