As of 2015, and excellent location to find a list of the best novels online is the Modern Library. The Modern Library was founded in 1917 by a well-known publishing company.
The Modern Library site provides lists of the top 100 novels chosen by the board of the organization as well as readers. The book title, ranking and author are provided.
This site also offers a top 100 list for the best nonfiction books. It is updated often and free to use. An email newsletter that keeps readers up to date on new releases and site updates is available.