After not knowing what to do with his book collection that he showed his wife which he has been taking from houses that get burned Montag met a man once that might be able to help him with books.
He Takes a Bible during a Burning, and realizes that books must be important if someone would light themselves on fire for one. Which is what happens at the house he gets the Bible from.
After the burning, Montag needs leisure time so he says he sick. Beatty comes to his house to tell him the history of how books came to be illegal and the problems they cause.