Percy Jackson: Sea of Monsters is the second installment of the Percy Jackson series based on the books by Rick Riordan. If you have read the Percy Jackson books and then you watch the first two films you will notice some changes for example the main characters ages were accellerated from 12 to 16. This is mainly because when you adapt a book to screen you can't expect the screen version to be an exact replica of the book. Having read the books after I saw Percy Jackson and the Lightning Thief I did notice that the film was alot different from it's book counterpart. Percy Jackson: Sea of Monsters is actually alot closer to it's book counterpart than it's prequel. I have really enjoyed both films and all five books I can't wait until the DVD release and the Titan's Curse. I recommend this film for anyone who loves the Percy Jackson books and who liked the first film.