I really liked this book because it was accessible, understandable, and actionable. What I liked most was Springer's truly holistic understanding of how the world works at the macro level (e.g., how demographics and geopolitics reshape economies and markets, how the US and the world ended up in so much debt, etc.) and his ability to articulate - in plain English rather than investment psychobabble - what that means for you and how you invest.
Springer makes a very strong argument that the "buy and hold" investment strategy doesn't work and then describes a new way to invest. For such a short book, it packs a whole lot of important information and concepts. As you read this book you will find yourself saying, "I wish I knew this when....".
It is clear that Springer is well informed and passionate about helping investors thrive regardless of the market environment. I wish I had this book when I started investing and I will absolutely be giving this book to my son as I teach him about investing.