If you want to understand the history of Berkshire Hathaway there are two good books to choose from. Buffett: The Making of an American Capitalist by Roger Lowenstein, which I summarized six months ago, or The Snowball by Alice Schroeder, summarized below.
The main difference between the two tellings is that Lowenstein focuses more on the Buffett Partnership and then Berkshire Hathaway as a company while Schroeder focuses more on Buffett the man, and the people in his life in and around those investment vehicles.
Or TL;DR, if you care more about the how, then stick with Buffett, and if you care more about the why, read Snowball.
Or if you prefer to listen than to read, let Ben & Dave of the Acquired podcast tell you a mix of the two versions in their 3-part, 10+ hour episode on Berkshire Hathaway. Part 1, Part 2, Part3
