WARNING: Good Scores Likely!
Why the title? Because this list reflects the preferences of List Challenges users during the mid to late 2010's by drawing on preexisting book challenges that had at least 19,000 users, as of May 10, 2019 (63 lists used). It lists books that were read by at least 50% of people on ANY of those challenges.
Books 1-40 seem particular favourites, as they occur on many of the 63 challenges with high percentages. (Note that the titles in this block and the next block of 44 are not ranked within each block.)
This is a companion challenge to my "Must-Reads Most Readers Read" (https://www.listchallenges.com/must-reads-most-readers-read). This has more children's and YA books, with around 50 individual books common to both lists.