If knowledge puffs up (1 Cor. 8:1), why read books? Reading is not as important as applying what you read. Practicing what you know has a far greater value than gaining more and more knowledge. Having said this, good leaders continually learn and grow. Books help us do that. Visionary leaders read. No doubt about it.
Invest money and time in reading. Read widely. Read authors who share your perspective and passions, and those who don’t. Try reading different types or genres of books. As in relationships with people, it is good to listen to new voices and be updated in current viewpoints.