Synopsis: Percy Jackson, the young demi-god, is back for his second exciting adventure in the bestselling series by Rick Riordan. You can't tell by looking at me that my dad is Poseidon, God of the Sea. It's not easy being a half-blood these days. You mortals can't even see the monsters we have to fight all the time. So when a game of dodgeball turned into a death match against an ugly gang of cannibal giants, I couldn't exactly ask my gym teacher for…