After learning that he is the son of a mortal woman and Poseidon, god of the sea, twelve-year-old Percy is sent to a summer camp for demigods like himself, and joins his new friends on a quest to prevent a war between the gods.

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.

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.

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 ten-year-old Zeus is kidnapped, he discovers he can defend himself with a magical thunderbolt.

Traveling across the treacherous boiling sea to save a fellow Olympian, Zeus, Hera and Poseidon are wrathfully targeted by Cronus and his Titan buddies, a situation that is further complicated by singing sirens, people-eating monsters and Poseidon's inability to swim.

Nico, the son of Hades, and his boyfriend Will, the son of Apollo, travel to Tartarus, the deepest, darkest part of the Underworld as they attempt to rescue an old friend.

Zeus and his fellow gods-in-training face a new challenge in the underworld when they attempt to capture Cerberus—the three-headed guardian and cherished pet of Zeus’ brother Hades—but find themselves up against more than they bargained for when they have to face off against Melinoe, the Greek goddess of ghosts, nightmares and funerary rites, and her skeletal minions.

"Follow along as the legendary Monkey King tries to save the world from a mysterious new threat--and smashes his way through the world of ancient Greek mythology in the process"--