When this list was created there were exactly 6 books with more than a million ratings, but a bunch just under that point. Please only add books with less than 100 ratings on Goodreads.

Helpful Librarians - if you help maintain this and other similar lists - please don't remove books from one of these lists for too many ratings unless you are willing to put it on the next list.

There are lists for even more books at:
Moderately Underrated Books (1,001 - 10,000 GR ratings)
Underrated Books (1,001 - 5,000 GR ratings)
Really Underrated Books (fewer than 1,000 GR ratings)
Really Seriously Underrated Books (fewer than 500 GR ratings)
REALLY Really Underrated Books (fewer than 100 GR ratings)
Super Underrated Books (fewer than 50 GR ratings)
Ridiculously Underrated Books (fewer than 20 GR ratings)
Really Underrated Children's Books (children's books with fewer than 100 GR ratings)
Just One Rating

Alternatively, see lists of books with the most ratings.