I expected The Road to be a lot longer, but I guess there isn't much to the story. It's post-apocalypse (the cause never explained), where a man and his son are walking south. They have to worry about staying warm, having enough to eat, and whether to trust the other people they occasionally meet on the road. Usually, they don't (and are right). There are some rather disturbing scenes.
I can see why it won the Pulitzer Prize. It strips our needs to the very basics, and deals with difficult issues. Where are they going, and what do they expect to find when they get there? It almost seems like they're walking because there isn't anything else for them to do. They're repeatedly close to dead, and then they get lucky and find some store of canned food or something. It makes you (and them) wonder why they don't give up.
The book starts with almost all imagery, too many descriptive words, not enough verbs, and it took a while for me to get into it. (I tend to want plot first, so I can get my bearings.) But eventually the action started, and because there are no chapters, I ended up reading it through, which is rare for me.