I was talking to a friend who’s a big Warren Buffett and Charlie Munger fan. He shared his views on their long-standing habit of buying cash-flow-generating companies and holding them forever via Berkshire Hathaway and the Daily Journal. I’m familiar with both and with their styles of investing, but my conversation with my friend made me want to dig a little deeper.

Before Berkshire Hathaway, Buffett was investing in publicly traded companies with money from limited partners. It was 1956. He was twenty-five years old when he became an investor entrepreneur by starting Buffett Partnership, Ltd. with seven limited partners (almost all of whom were family) and raising $105,000.

Buffett is well known. He went on to have a wonderful track record as an investor. But what really intrigues me is the fact that he didn’t want to work for anyone else. Deciding to bet on himself, he started his investing partnerships. That’s strong entrepreneurial spirit combined with an investor’s mindset.

I want to learn more about his mindset in those early days and how he went about building his partnerships and investing in other companies. Buffett regularly wrote letters to his limited partners. I’ve decided to read all those letters to learn more about his early days, his entrepreneurial spirit, and, hopefully, what led to his outsize success.