A Clockwork Orange

I have heard of this book before because of the movie and I have always wanted to read. One thing I didn't know was how much of a slang there is. It really makes the book though and develops the it. The slang is what really gets me into to the book, i like trying to figure out what the words mean before looking them up. I'm not completely done with the book yet but I have liked it so far. The two questions I think about is can criminals ever change completely? and is incarceration better or is rehabilitation better for criminals?