This is an update of a previous challenge, itself based on a ranking list from Stanford University. 21 books have been added (in positions 201-221). Some "cosmetic improvements" have also been made. Thanks to the original poster Lingtoness.
Needless to say, people who used the original challenge (posted in early 2015) will likely increase their total score.
For the actual list go to http://web.stanford.edu/~bkunde/best/bl-crank.htm.
For an explanation of the ranking methodology click on the challenge URL.