Percy Jackson & the Olympians: The Lightning Thief (2010)

Percy Jackson & the Olympians: The Lightning Thief (2010) ranks fourth, as Chris Columbus aged up Rick Riordan's twelve-year-old protagonist to a teenager and gutted the novel's mythology-driven plot. Riordan publicly expressed his dissatisfaction, and it took a Disney Plus series over a decade later to finally do the books justice. While better rated than The Cat in the Hat's 10%, this film's 49% Rotten Tomatoes score still sits 14 points below the average book adaptation's 63%, and its $89 million domestic gross fell 30% short of the typical youth fantasy movie's $127 million, disappointing a fanbase that had 35 million books sold to draw from.