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Title: Filling the gap none others due.
Review: I almost never give a book 5 stars, and probably wouldn't have here if it weren't for the fact that the book is practically the only of its kind in my experience. I would estimate it is best for the 14-20 kyu (American), but one can stretch that by 4 in either direction.I would say this books greatest strengths are its breadth and its focus on principles and explanation.
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