 The only way that I learned my father's business was mostly reading his emails because he never taught me about what his businesses were, who ran them. So I'd go through his emails, and one night the manuscript was due to Penguin that morning, and I was just searching for something from my father that I could give in the new edition. And I found this letter where he said he generated more wealth in the last six months than the prior eight years combined. And it was all because of this one thing.