Let me start by saying that it's LONG. It's really no joke. If you are new to reading investment books, English is not your mother tongue, and your Kindle has a tendency to discharge on its own, you are not in for a treat. It took me almost 4 years to finish, but I only recently developed what it takes to drag the finish line on the horizon - daily reading. If you treat it as a full time job perhaps you can do it in 2 months. At least I took my time and didn't skip anything, and highlighted hundreds of passages that are worthy of a re-read.
While a regular book of a few hundred pages would almost "read itself" in a month if you just do a few pages even while on the toilet, the Letters span over 1750 pages and by the time you are done you'll see that new ones will have spawned, available in PDF. It does not help that many letters are repetitive like detailing the annual meeting or how Berkshire works, over and over again, with only a handful of words and values changed. Yes, a given sentence could appear like 18 times, so if you read one letter every day, it's very hard to focus because it feels like an infinite loop - if you don't skip anything. "Helped" by accounting and business verbiage, my reading speed was unusually low, in the 8-12 pages/hour range. So expect to spend as much time as watching the entire TV show Friends twice, or a 10 seasons of a full-length 42 minute show without ads, or about a week of your time (in non-stop terms). The older the letter the more complex words it has. Sometimes a sentence spans over 6 lines and by the end of it you forget how it started, forcing you to re-read constantly. Especially with today's short attention spans of people, it's not easy. But substracting a star because of the difficulty and length would be akin to complaining that a double black diamond is too steep to ski on.
It's hard to sum up what I learned but it was a good journey. I learned over many iterations how and why the corporate culture is better in Berkshire than in most other companies. How that led to better decisions. He leads the viewer from the very beginning to today's state which is an amazing transformation from a declining textile operation to a huge conglomerate holding. It is also detailed why this structure is adventageous, almost to a point where I'd want to buy a few shares. If I had completed the book earlier I would surely have bought some below 1.2 P/BV during the corona times.
He rarely comments on current world events (headlines), and is very good at focusing on just writing about the company's dealings. I learned that they are not stock pickers, they buy businesses and not tickers. The pros and cons of buying a bit of a publicly-traded company vs. owning some in full became clear. I think the smart ones can be influenced by their very prudent business selection process. It was quite instructive to learn why unproductive and currency-denominated assets are eroding one's capital, how to never trust most money managers and funds, what does "average performance" means, how fees are evil, and the future of the company and his shares.
Warren is a great guy, the kind that you'd love to have as a grandpa - and not in hopes of inheriting a fortune but as someone to learn valuable lessons from. By way of these letters he could be any long-term investor's virtual grandpa. I think those that don't shy away from owning a stock for decades will find the most value in the book, however the day traders and crypto fans will of course see it utterly boring. If the importance of sitting and sleeping comfortably with your investment is of importance you might end up heeding some of his advice or even become a shareholder.
One thing that stuck out that he is humble yet very proud at the same time. Of his partners in this enterprise, but also very much of America itself and refers to its tailwind that helped american businesses. I view him as an optimist, an attitude that certainly helps if you plan really long term. Oh, and compound interest (on retained earnings) unfolds before your eyes, year by year, as we are nearing the 60th letter (may he write many more).
The sometimes humorous read is full of wisdom, and it's a giant undertaking to read, for sure. However, it was worth it and by the end I got to develop a reading habit that will help me with the regular and much shorter books in the future.