3rd part of the fantasy bestseller series. The gods of Olympus fear the worst, as the Titans prepare for war! Percy and his friends must rescue the goddess Artemis from the clutches of dark forces by the winter solstice. They will face the most dangerous monsters of Greek mythology and find themselves in deadly peril. But the Titans have not counted on Percy. By now, everyone knows he is no ordinary hero - after all, he is the son of Poseidon!.