Reading is the foundation of every form of wealth: mental, spiritual and financial. There is even an argument to be made that reading good books is good for you physically, as you can learn to eat better and exercise more productively.
Books are the cornerstone of knowledge. The more you immerse yourself in quality material, the better decisions you can make.
Focusing on only recently published books is a mistake. Avoiding novels is also an error. A well rounded education comes from digesting material from all genres, even topics you normally find uninteresting. Even fiction can teach us plenty about the world around us and ourselves.