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Justin Sullivan/Alex Wong/Michelly Rall (All Getty)
The most powerful people in business spend much of their limited free time on a quiet, contemplative pursuit — reading books. 
For example, the third-richest person in the world, Warren Buffett, says he spends 80% of his day tearing through the written word. 
We've pored over interviews with some of America's most influential execs — from Bill Gates to Jeff Bezos and Oprah Winfrey — to find out what they read.
Here are the favorites.