451°F is certainly a classic science fiction book. I re-read it since I'd just re-read Starship Troopers but it didn't seem to "age" as well as that book. The philosophy is just as important, but didn't seem to be delivered as effectively. There is a much increased use of imagery in Fahrenheit 451, and that makes it a much different read than books like Starship Troopers. Still, a critical book in the science fiction canon.