What book is the highest in points for fourth graders?

Harry Potter and the Sorcerer's Stone is worth 12 points but it is reading level 5.5. Books with a 4th grade reading level include Amber Brown is Green With Envy at 3 points; Artemis Fowl The Eternity Code Graphic Novel is worth 3 points; and Howliday Inn is worth 4 points. The Plant That Ate Dirty Socks is worth 4 points.