Describe what Montag learns about the group of men aka the, "Book People".

Montag discovers that the group of men are all old intellectuals: authors, professors and clergymen who are hiding out along the tracks to avoid imprisonment. Each of the men, Montag learns, has memorized a work of literature, so they may keep books alive until it is safe to print them again. Granger explains that they will pass their knowledge through generations until such a time when people are again enlightened enough to seek out ideas and opportunities to learn.