Warren Buffett REUTERS/Rick Wilking When Warren Buffett started his investing career, he would read 600, 750, or 1,000 pages a day.

Even now, he still spends about 80% of his day reading.

"Look, my job is essentially just corralling more and more and more facts and information, and occasionally seeing whether that leads to some action," he once said in an interview.

"We don't read other people's opinions," he said. "We want to get the facts, and then think."

To help you get into the mind of the billionaire investor, we've rounded up 18 of his book recommendations over 20 years of interviews and shareholder letters.