All year the half-bloods have been preparing for battle against the Titans, knowing the odds of a victory are grim. KronosÕs army is stronger than ever, and with every god and half-blood he recruits, the evil TitanÕs power only grows.

While the Olympians struggle to contain the rampaging monster Typhon, Kronos begins his advance on New York City, where Mount Olympus stands virtually unguarded. Now itÕs up to Percy Jackson and an army of young demigods to stop the Lord of Time.

In this momentous final book in the New York Times best-selling series, the long-awaited prophecy surrounding PercyÕs sixteenth birthday unfolds. And as the battle for Western civilization rages on the streets of Manhattan, Percy faces a terrifying suspicion that he may be fighting against his own fate.