Hugo Award winner
Forget the Hunger Games. A Canticle for Leibowitz is the grandaddy of all post-apocalyptic novels. In it, Walter M. Miller Jr. eloquently dissects the nature of mankind in a moving manner that is also surprisingly funny.
The late Philip K. Dick's works were one of the strongest influences on science fiction writers in the first decade of the 21st century, including the fields of alternate history and paranoid thrillers.