"The Greek and Roman demigods must simultaneously prevent the earth mother, Gaea, from waking and stop war from breaking out at Camp Half-Blood"-- Provided by publisher.

Demigod Percy Jackson, still with no memory, and his new friends from Camp Jupiter, Hazel and Frank, go on a quest to free Death, but their bigger task is to unite the Greek and Roman camps so that the Prophecy of Seven can be fulfilled.

When the goddess Artemis disappears while hunting a rare, ancient monster, a group of her followers joins Percy and his friends in an attempt to find and rescue her before the winter solstice, when her influence is needed to sway the Olympian Council regarding the war with the Titans.

When demonic cheerleaders invade his high school, Percy Jackson hurries to Camp Half Blood, from whence he and his demigod friends set out on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

"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"--

Leaving the safety of the demigod training ground, a disgraced Apollo embarks on a quest across North America to find a dangerous ancient-world Oracle while navigating the challenges of the evil Triumvirate.

The Greek god Apollo is still in the persona of ungifted human teenager Lester Papadopoulos. Now Lester and his demigod friends must go through the Labyrinth to find the third emperor-- and an Oracle who speaks in word puzzles-- somewhere in the American Southwest. But the longer he stays mortal, the weaker he grows... and the less confident that he will be able to regain his place on Mount Olympus.

"Percy Jackson, a modern-day demigod, tells the origin stories of the gods of Olympus and provides an insider's point of view - with plenty of attitude - in this illustrated collection"-- " 'A publisher in New York asked me to write down what I know about the Greek gods, and I was like, Can we do this anonymously? Because I don't need the Olympians mad at me again. But if it helps you to know your Greek gods, and survive an encounter with them if...

The trouble starts when Apollo introduces Percy and his friend Grover the satyr to the Chryseae Celedones. Three golden women--living statues--appear in front of them, and sing one blissful chord. Apollo has a concert tonight at Mount Olympus, and he needs the Celedones as his backup singers. But there should be a quartet, not a trio--one of the singers has gone rogue. It's up to Percy and Grover to find the missing Celedon somewhere in New York City...

"Every seven years, the Agon begins. As punishment for a past rebellion, nine Greek gods are forced to walk the earth as mortals, hunted by the descendants of ancient bloodlines, all eager to kill a god. Long ago, Melora Perseous fled that brutal world in the wake of her family's sadistic murder, turning her back on the hunt's promises of eternal glory. But now, two participants seek out her help; Castor, a childhood friend of Lore believed long dead;...