At at one time. You have to. Reading reading books is a good habit. It tells us about how the world works. It helps us to change our habits, to become more popular, productive. It helps us to guide to improve ourselves daily. But can we achieve our goals by just reading? Knowledge is only useful when we apply that knowledge in our life. That's why we should not only read books, but we must apply those methods of improvement in our life. Thanks for listening