This counts as a Classic for me...it's 50+ years old. It's classic, okay?
My favourite classical book is 'Fahrenheit 451' by Ray Bradbury. I read this recently actually because I found it in my older brother's room and I remembered talking about it with Mara once before...so I instantly snuck it into my jacket like Liesel and since then...read 'till my heart was never even close to contentness.
This book has an absolutely FANTASTIC plot, and the idea for it is amazing. I did write a review for it previously, so you can check that out if you're interested in more :) This truly is an amazing book though...definitely worth its classic title.