Man of the Waves
The second titan war was in the
last book of the first series. In that
book Camp Half-Blood has to
defend Manhattan from Kronos,
the lord of titans, and his army of
monsters. Meanwhile the gods fight
Typhon, the dad of monsters.
In the second series,the
Heros of Olympus, Percy
lost his memory and found
a Romen camp.They sent
him on a quest to stop
Gaea, the evil ea