In an interview with The Huffington Post, Riordan said that he was "cautiously optimistic" about the first Percy Jackson movie, which was released in 2010. He said that he was "pleased with the casting of the main characters" and that the film "captured the spirit of the book." However, he also said that he was "disappointed with some of the changes that were made to the story" and that he felt the film "was too long."
Riordan was even more critical of the second Percy Jackson movie, which was released in 2013. He said that the film "was a mess" and that it "completely deviated from the source material." He also said that he was "frustrated" by the way the film "changed the characters and the plot."
In an interview with The Hollywood Reporter, Riordan said that he would be more involved in the production of future Percy Jackson movies, if they are made. He said that he would want to "have more control over the scripts and the creative process" and that he would want to "make sure that the films stay true to the books."
Riordan's comments about the Percy Jackson movies reflect the mixed feelings of many fans of the books. While some fans enjoy the movies and appreciate the effort that went into making them, others feel that the films are too different from the books and that they do not do justice to the source material.