The most important message of the book according to the author, Guy Spier. Nothing matters as much as bringing the right people into your life. They will teach you everything you need to know.
There is a lot to like about this book. It has good storytelling and gives a broad overview of various types of investing and investing philosophies. The overarching theme is learning not to lose money, and having a written plan in place before investing.
Charlie Munger wrote a letter containing this list of Warren Buffett's eight reserved activities. My favorite one is: "His first priority would be reservation of much time for quiet reading and thinking, particularly that which might advance his determined learning, no matter how old he became." The post contains a list of all eight.
The Richest Man in Babylon is written in story form; fun to read and easy to understand regardless of your financial education. It's a concise book and hard to put down once you start reading. The key concept is "Money is plentiful for those who understand the simple laws which govern its acquisition."