Percy Jackson: Sea of Monsters is pure family-friendly froth

Man, it’s a difficult life being the child of a god.

It’s been three years since teenage demigod Percy Jackson (Logan Lerman) last appeared in The Lightning Thief, his equivalent of Harry Potter and The Philosopher’s Stone. In it, Percy learned about his mystical heritage, headed over to Camp Half-Blood (a slightly more outdoorsy Hogwarts), and headed off for his first adventure with his two new best friends.…