Random House Modern Library's 100 Greatest Novels of the 20th Century

It is a list of the Top 100 “Modern Library” Novels of the 20th Century—as in, novels published by Modern Library. They picked their own books. It’s their list, so their rules, so their books. That’s why there are great books that didn’t make THIS list.

There are a zillion other “best books” lists, including lists by other publishing companies (Radcliffe, Easton, etc.).