Anthony Jay “Tony” Robbins is an American author, entrepreneur, philanthropist and life coach. Robbins is known for his infomercials, seminars, and self-help books including Unlimited Power and Awaken the Giant Within.
Maya Angelou was an American poet, singer, memoirist, and civil rights activist. Angelou is best known for her series of seven autobiographies.
Oliver Napoleon Hill was an American self-help author. He is known best for his book Think and Grow Rich which is among the 10 best selling self-help books of all time.