Damianos of Akielos has returned. His identity now revealed, Damen must face his master Prince Laurent as Damianos of Akielos, the man Laurent has sworn to kill. On the brink of a momentous battle, the future of both their countries hangs in the balance. In the south, Kastor's forces are massing. In the north, the Regent's armies are mobilising for war. Damen's only hope of reclaiming his throne is to fight together with Laurent against their usurpers. Forced into an uneasy alliance the two princes journey deep into Akielos, where they face their most dangerous opposition yet. But even if the fragile trust they have built survives the revelation of Damen's identity – can it stand against the Regent's final, deadly play for the throne?

All year the half-bloods have been preparing for battle against the Titans, knowing the odds of victory are grim. Kronos's army is stronger than ever, and with every god and half-blood he recruits, the evil Titan's 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 it's 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 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.

Damianos of Akielos has returned. His identity now revealed, Damen must face his master Prince Laurent as Damianos of Akielos, the man Laurent has sworn to kill. On the brink of a momentous battle, the future of both their countries hangs in the balance. In the south, Kastor's forces are massing. In the north, the Regent's armies are mobilising for war. Damen's only hope of reclaiming his throne is to fight together with Laurent against their usurpers. Forced into an uneasy alliance the two princes journey deep into Akielos, where they face their most dangerous opposition yet. But even if the fragile trust they have built survives the revelation of Damen's identity – can it stand against the Regent's final, deadly play for the throne?