The Greatest Books Ever Written
Taken from the latest updated version of The Greatest Books list (thegreatestbooks.org), this list is generated from 128 "best of" book lists from a variety of great sources. An algorithm is used to create a master list based on how many lists a particular book appears on. Some lists count more than others. I generally trust "best of all time" lists voted by authors and experts over user-generated lists. On the lists that are actually ranked, the book that is 1st counts a lot more than the book that's 100th.
avg. score: 48 of 250 (19%)
required scores: 1, 19, 35, 50, 70