Dale Carnegie (1888-1955) was an American writer and lecturer and the developer of famous courses in self-improvement, salesmanship, corporate training, public speaking and interpersonal skills. He was born in an impoverished family in Maryville, Missouri. Carnegie harboured a strong love and passion for public speaking from a very early age and was very proactive in debate in high school. During the early 1930's, he was renowned and very famous for his books and a radio program. 'When How to Win Friends and Influence People' was published in 1930, it became an instant success and subsequently became one of the biggest bestsellers of all time. Carnegie loved teaching others to climb the pillars of success. His valuable and tested advice was used in many domains and has been the inspiration of many famous people's success. One of the core ideas in his books is that it is possible to change other people's behavior by changing one's reaction to them.

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Lincoln the Unknown is a biography on Abraham Lincoln, written by Dale Carnegie.