The Book (n.) is a thing, whereby the best thereof are those that tell you what you know already.
The Book (n.) is varied with various purposes. Some one reads over and over again, some become part of the furniture of one's mind and alter one's whole attitude to life, some one dips into but never reads through, some one reads at a single sitting and forgets a week later.
The Book (n.) is unappreciated. The cheaper they become, the less money is spent on them.
The Book (n.) is best when it can tell you what you know already, but in an enormously more powerful, more systematic, less fear-ridden manner.
The Book (n.) is best which tells you what you know already.