Check out this Reddit session with questions being answered by Alice Schroeder, author of The Snowball: Warren Buffett and the Business of Life.
“I was fortunate to have spent 10 years getting to know Warren Buffett by spending days and weeks with him. I could ask him anything and you can ask me anything as well. Some of you may want to know why he chose me. In his words, he likes the way I think, he likes the way I write. Spending thousands of hours with Warren was like getting a Ph.D., or maybe more than one. Before writing The Snowball, I was an analyst at several firms on Wall Street, a regulator, a CPA, and now I invest, and serve on corporate boards. From auditor to board member I’ve seen the sausage factory. My motto is: do whatever will teach you the most.”
Hurricane Capital 
