â€¢ Self-described `` Undisputed King of Motivation '' was known for his seminars . He wrote more than two dozen books on salesmanship and motivation . His most famous book is " The Power Of Habit, " which has sold over a million copies worldwide.
Self-described `` Undisputed King of Motivation '' was known for his seminars . He wrote more than two dozen books on salesmanship and motivation . His most famous book is " The Power Of Habit, " which has sold over a million copies worldwide.