All year the half-bloods have been preparing for battle against the Titans, knowing the odds are against them. Kronos is stronger than ever, and with every god and half-blood he recruits, his power only grows.

In this momentous final book in the New York Times best-selling series, the prophecy surrounding Percy’s 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.

“The clash of modern and classical worlds is both exciting and entertaining.” —The New York Times Book Review

”Riordan masterfully orchestrates the huge cast of characters and manages a coherent, powerful tale at once exciting, philosophical and tear-jerking. The best-selling series’ legions of fans will cheer their heroes on and rejoice in such a compelling conclusion to the saga.”— Kirkus Reviews (starred review)