［美］曼紐爾•J•史密斯

世界級心理學大師，美國最權威、最負盛名的心理學傢，他在加州大學擔任心理學教授，同時也是美國心理學會、精神生理學研究協會的會員。

自60年代起，他對“強勢”這一革命性的心理自助領域發起研究，並於1975年首次將研究成果集結於本書齣版。40餘年來，本書多次榮登美國亞馬遜圖書榜第一名，並先後被英、德、荷、日等幾十個國傢和中國香港、颱灣地區引進版權，全球熱銷逾韆萬冊。

他以本書內容為基礎專門開設的“強勢力訓練課程”在美國引起巨大轟動，並影響至今。當時前往聆聽和學習這門課程的除瞭哈佛大學、斯坦福大學、加州大學的學生外，還有高盛、摩根大通等世界500強企業員工和美國白宮智囊團、美國FBI以及多個國傢的外交人員等。書中的理論和方法，曾被喬布斯、剋林頓、希拉裏、奧普拉等多位“大人物”親身實踐運用，並立竿見影地改變瞭他們此後的事業和人生。

From the Publisher The best-seller that helps you say: "I just said 'no' and I don't feel guilty!" Are you letting your kids get away with murder? Are you allowing your mother-in-law to impose her will on you? Are you embarrassed by praise or crushed by criticism? Are you having trouble coping with people? Learn the answers in When I Say No， I Feel Guilty， the best-seller with revolutionary new techniques for getting your own way. --This text refers to the Mass Market Paperback edition. Inside Flap Copy The best-seller that helps you say: "I just said 'no' and I don't feel guilty!"  Are you letting your kids get away with murder?  Are you allowing your mother-in-law to impose her will on you?  Are you embarrassed by praise or crushed by criticism?  Are you having trouble coping with people?  Learn the answers in When I Say No， I Feel Guilty，  the best-seller with revolutionary new techniques for getting your own way. --This text refers to the Mass Market Paperback edition.