"It's official: Batpig is a super-swine hero! But Batpig's alter ego, Gary Yorkshire? He still does ordinary things like going to school and taking tests. So what happens when Gary gets a little help on his biology test from a magical creature named Sharkraham Lincoln (half shark, half sixteenth president) and sets off a cheating scandal? Or when he goes off to summer camp to relax...and has to save the day without his Batpig uniform? It's not easy...

After learning that he is the son of a mortal woman and Poseidon, god of the sea, twelve-year-old Percy is sent to a summer camp for demigods like himself, and joins his new friends on a quest to prevent a war between the gods.