Close icon Two crossed lines that form an 'X'. It indicates a way to close an interaction, or dismiss a notification. Adam Mead with Warren Buffett's right-hand man, Charlie Munger. Adam Mead This story is available exclusively to Insider subscribers. Become an Insider and start reading now. Adam Mead is the author of the upcoming book, "The Complete Financial History of Berkshire Hathaway." Warren Buffett's concentrated investments, skillful delegation, and efforts to educate shareholders struck Mead during his research. Here are Mead's seven key takeaways about Buffett and Berkshire. Adam Mead devoured more than 10,000 pages of annual reports, regulatory filings, meeting transcripts, and other research material to assemble "The Complete Financial History of Berkshire Hathaway."