Stephen R. Covey, a former business professor whose 1989 leadership manifesto “The 7 Habits of Highly Effective People” sold more than 20 million copies on the way to becoming one of the most highly effective volumes in the history of self-helpStephen Covey, author of the popular book "The 7 Habits of Highly Effective People," has died. He was 79 years old. In a statement sent to employees of a Utah consulting firm Covey co-founded (FranklinCovey), his familyStephen Covey, author of the popular book "The 7 Habits of Highly Effective People," has died. He was 79 years
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