While the Olympians struggle to contain the rampaging monster Typhon, Kronos begins his advance on New York City, where Mount Olympus stands virtually unguarded. Now it's up to Percy Jackson and an army of young demigods to stop the Lord of Time.

In order to fit in at Mount Olympus Academy, new girl and forest-mountain nymph Echo copies the mannerisms of all the other students, but instead of ingratiating herself to her classmates, it only seems to grate on them.

"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"

"In his penultimate adventure, a devastated but determined Apollo travels to Camp Jupiter, where he must learn what it is to be a hero, or die trying"--

"When Medusa suddenly becomes able to turn objects into gold just by touching them, she is thrilled. Gold, gold, everywhere! But it's not just objects that become golden--it's also food, and, even people! Her new ability turns out to be more dangerous than delightful, but can she do anything to reverse it?" --

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.

"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"-- How do you punish an immortal? By making him human. After angering his father Zeus, the god Apollo is cast down from Olympus. Weak and disorientated, he lands in New York City as a regular teenage boy. Now, without his godly powers, the four-thousand-year-old deity must learn...

When Orpheus, a charming mortal musician, arrives at Mount Olympus Academy, he asks Persephone to help reunite him with his lost love, Eurydice, but trying to manipulate the rules of the underworld puts her at odds with her boyfriend Hades.

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.

For an extra credit project, Aphrodite begins a club for matchmaking mortals, which brings her to Egypt and face-to-face with her competition, the Egyptian goddess Isis.