Caught in the middle of an ancient power struggle, Emily and Pegasus must venture to Diamond Head volcano in Hawaii to track down the one thing that can save Olympus--before the Titans get there first.

From the streets of Rome to the caves of the Kirin and beyond, humans, chimaera, and seraphim will fight, strive, love, and die in an epic theater that transcends good and evil, right and wrong, friend and enemy.

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.

Nimbus the pegasus wonders why she cannot be sunny all the time like everyone else, but when she introduces her friend Kelp to her cloud, she finds the unicorn is a very good listener.

"Pegasus and Emily investigate a series of incidents back on Earth, and discover that the CRU has been cloning Olympians"--

"In ancient Greece, a skilled marble sculptor has been blessed by a goddess who has given his masterpiece--the most beautiful woman the town has ever seen--the gift of life. After marrying her, he expects Galatea to please him, to be obedience and humility personified. But she has desires of her own and yearns for independence. In a desperate bid by her obsessive husband to keep her under control, Galatea is locked away under the constant supervision...

"Jason, Piper, and Leo, three students from a school for "bad kids," find themselves at Camp Half-Blood, where they learn that they are demigods and begin a quest to free Hera, who has been imprisoned by Mother Earth herself."--Provided by publisher.

After discovering a secret that makes him question the honor of being the son of Poseidon, demi-god Percy Jackson journeys into the Sea of Monsters in an attempt to save Camp Half-Blood.