I picked up this book out of an interest in gaining business insights from a successful entrepreneur and financial leader. Without question, Ray Dalio has a knack for figuring out ways to make money using financial instruments, in particular via hedging strategies on commodities. He tries to detail many personal as well as business principles that led to his (and his hedge fund's) success. What I walk away from, though, is that it is difficult to quantify or create an algorithm for success, as many of these principles try to outline. Dalio's own hedge fund has struggled with new leadership, after his departure as CEO, highlighting again that there are some ingredients to success that are hard to quantify and replicate. Other factors that led me to give this book a modest rating - the writing is at times almost childish. For example, early in the book, he describes his interest in meditation, stating how his friend Steve Jobs loved meditation, he tried meditation too, it's been good for him! To his credit, Dalio is quite candid about his life, including his family, in this book, showing a vulnerability in describing the family's struggles with his son's depression, for example. Regarding the details of business and the hedge fund industry, I walk away with more affirmation of my view of this as a shallow endeavor. As an example, Dalio details how proud he was early in his career, in helping McDonald's create chicken nuggets, by creating financial hedging instruments for the chicken suppliers to weather fluctuations in chicken feed and other costs. Not sure many other people would take pride in helping make chicken nuggets a reality! There's also some unsavory details about life as a hedge fund king, such as hiring strippers for company parties. Overall, though, there are some interesting tidbits on business, and personal success that make this worth skimming through.