Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Why I don&#65533;t recommend this book.

Like any other book some people like it but others don't, since readers come from different backgrounds it is some time's your background and previous knowledge which will lead your absorption to a books material, since I cant assess any of the potential readers ability's and background I will give you a general reason why I will not recommend this book.When Material is tough and hard to absorb a writer should try doing one of two things. He could build up knowledge from the easy stuff up, and some extra explanation or he could at least keep you interested and willing to repeat what you have just read and these writers did neither.