In addition to the Macedonian episode Paul had fallen into a trance while praying in the Jerusalem temple, and while in the trance had been told unmistakably to get out of Jerusalem. The apostle's experience of God had been vivid over and over. Compared to his experience of God reading a book sounds so flat, so pedestrian, simply so dull. Obviously he thinks he needs books. Books are essential to his discipleship as a Christian as well as to his vocation as an apostle.
Books are vital.
People who read books are very different from those who do not. A society that reads books is very different from a society that does not. In his novel, Nineteen Eighty-Four , George Orwell depicted a society crushed in the tentacles of cruel totalitarianism. One feature of such a society, Orwell insisted, was the banning of books. The oppressor would continue to oppress his victims by many means, not the least of which was the banning of books.