What does Faber suggest is necessary for a book to have value?

Faber is a character in the novel Fahrenheit 451, by Ray Bradbury.
Faber says that there is "nothing magical" about books themselves, but only in what they say. A valuable book is one which has "quality," defined by Faber as offering up "truthfully recorded details of life." Valuable books should contain "detail" and should "touch life often." Valuable novels should show "pores in the face of life," where mediocre books shy away from telling things as they really are. "Texture of information" is to be prized.
Faber explains to Montag that there are three things necessary for books to be useful again:

Number one, as I said, quality of information. Number two: leisure to digest it. And number three: the right to carry out actions based on what we learn from the inter-action of the first two.

Getting books for the sake of getting them, he explains, is beside the point if the books are not valuable and if nobody knows how to take action from what value they contain.