I've read about 50 of them, but I consider only 6 worth reading out of the whole 100.
To Kill a Mockingbird
1984
Grapes of Wrath
Brave New World
Of Mice and Men
Animal Farm
No Cervantes on the list, no William S Burroughs, no Ray Bradbury, no Murakami or Yoshimoto or Abe, no Cheever or Welty or....well, my top 100 wouldn't be anything like this list