A book explaining techniques for speaking that greatly change people's impressions. - Title: People Change 90% by How They Speak - Author: Ken Fukuda - Publisher: Keizaikai - Price: 800 yen - Pages: 41 Thank you for viewing. As this is a used item, some scratches and stains from use are unavoidable. There may also be lines drawn with a highlighter. Please refrain from purchasing if you are sensitive to such things. Thank you for your understanding.