"After angering his father Zeus, the god Apollo is cast down from Olympus. He must learn to survive in the modern world until he can somehow find a way to regain Zeus's favor"--

When Camp Half-Blood, the only safe haven for demigods, comes close to being overrun by mythological monsters, Percy must find his best friend Grover, who is prisoner on an island in the Bermuda Triangle, and then set out to save the Camp.

Every seven years there is a hunt offering mortal descendents of gods the opportunity to claim their divinity by killing any of nine immortals made mortal for one night. Lore Perseous has no desire to participate in the Agon, embittered because her family was killed by a rival who then ascended to godhood. When a childhood friend asks her to help, and a wounded god offers an alliance, Lore overlooks the steep cost of this decision in exchange for...

"The Greek and Roman demigods will have to cooperate in order to defeat the giants released by the Earth Mother, Gaea. Then they will have to sail together to the ancient land--Greece itself--to find the Doors of Death"--Provided by publisher.

Joined by his friends and half brother, Percy journeys to the Sea of Monsters to retrieve the Golden Fleece and save Camp Half-Blood.