Most Common Books on List Challenges
I have taken hundreds of the book list challenges and these are 175 of the most frequently listed books. This list includes a wide variety of children, teen, and classic books. I don't claim that these are exactly the top 175 most frequently used books. This is a guesstimate.
avg. score: 61 of 175 (35%)
required scores: 1, 37, 51, 65, 84