The list author says: "Some of my favorite SF books, not in order. For a series, I just listed the first book. I have a separate list of noirish books. See also the following. (However, definitely some so-so books there, or ones that haven't held up over the years.) - https://www.worldswithoutend.com/lists_locus_bestsf.asp - http://www.npr.org/2011/08/11/139085843/your-picks-top-100-science-fiction-fantasy-books"