Well, there is so much out there.
George Orwell. Pretty much anything but as always 1984.
Tinker Tailor Soldier Spy. One of the best spy novels around. The movie was good but it glossed over a hell of a lot to make it fit into 2 hrs, including the credits.
Since you mentioned Hunger Games, one on my future reading list is Battle Royale. The general consensus is that HG has the better protagonist and emotional side while BR is about the horror/brutality/paranoia as well as the true nature of people. As such HG is geared to young women while BR is not.
The Hunt for Red October is a great read. The movie is quite good but it lacked depth and is more of an action movie. The premise of the movie was 'oh my God he is going to launch and start a war!'. Well. No. If that was the goal all they had to do was launch everything at Europe and devastate it all. Buh bye. A pretty big plot hole and something dealt with quickly and discarded. So the premise of the book is significantly different.
World War Z is quite good. Forget you ever saw Brad Pitt. Only thing in common is the title. The premise of the book is that it is an historical account of a war that was already fought and won using interviews of survivors discussing the prelude, the war, and the aftermath. So not a zombie action movie. Spoiler: the zombies lost.