I am afraid you are asking two questions - you are only allowed to ask one question each day, so I will deal with the first one. In many ways, this novel is a study of how an individual can feel increasingly alienated from his own life and society, and alienation is a theme that is swiftly established from the beginning of the novel. Montag's love of burning books and the smell of kerosene is quickly challenged by a conversation with his neighbour, Clarisse McClellan. She asks him if he is happy, and although Montag replies in the affirmative, his subsequent return to his house, and discovery that his wife has taken an overdose intensifies his alienation. Her habits of leading a fantasy virtual life in which he has little part and his inability to connect or relate to her likewise reinforce this impression. Finally, the clincher if you like, is the first burning we read about, where the culprit willingly ignites herself and her books rather than go into custody. These are three central aspects of the novel that increase and exacerbate the alienation of Montag and drive him to make the choices that he does.