Fahrenheit 451

Today, I started the book Fahrenheit 451 by Ray Bradbury. Just by looking at  the cover, I can tell that this book is going to be interesting since there is a book full of matches. I've read that this book is about a man named Guy Montag. Montag is a firemen , but this book is set towards the future so in the future, firemen start fires instead of stop fires. Why do they start fires? Don't ask me, I don't know yet. All I know is that in the future, firemen burn books and houses that held the books. Also, if people had the books in their house, they were marked as crazy, insane. As I continued to read, Montag meets this seventeen-year old girl named Clarisse McClellan. I , for one, think that she is a very smart and curious girl. Other people though, don't think the same. They think she is very, very strange. An example from the text would be on page 20, it states, "I've got to go see my psychiatrist now. They make me go."
Anyway, one day Clarisse says, "Is it true that long ago firemen put fires out instead of going to start them?" and Montag replies by saying, "No. Houses have always been fireproof, take my word for it." (page 6, paragraph 3 and 4).   Okay, not true. Don't take his word for it. How did their society all of a sudden go from preventing houses from catching on fire to set them all on fire if they have any books? The only main reason why people in this book consider people who have books insane because it is against the law. Another event that occurred as I was reading, was that suddenly, Clarisse doesn't meet with Montag anymore. This made me worried, where did she go? In order to answer my question, I have to keep on reading.