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

Percy Jackson's hope for a normal senior year is shattered as the gods present him with three quests, beginning with the retrieval of Zeus's goblet, in order to get the necessary three letters of recommendation for college.

The highly anticipated conclusion to the best-selling series finds Lester tackling his final challenge at the Tower of Nero, where the former god Apollo and his demigod master, Meg, follow a prophecy uncovered by Ella the harpy.

"When mysterious incidents start wreaking havoc throughout Camp Jupiter, suspicion falls on the Fourth Cohort's newest probatio. But is she really to blame? Find out the truth by delving into the pages of her personal journal"--Provided by publisher.

Greek and Roman demigods from the Prophecy of Seven must work together to seal the Doors of Death--and help Percy and Annabeth escape the Underworld in the process.

Racing to Olympus when the Titans escape Tartarus and gear up for war, Ron and the Olympians receive unexpected support from Gaia, the wife of Uranus, who urges them to help rescue Cronus' three imprisoned brothers.

In order to placate Eurythseus, Hercules must steal a golden belt from an Amazon warrior, but first he encounters the fearsome giant Alkyoneus, who plans to feed him to his seven hungry daughters.

Finding out she's the daughter of Zeus is not what a foster kid like Phoebe Katz expected to hear from a talking statue of Athena. But when her beloved social worker is kidnapped, Phoebe and her two friends must travel back to ancient Greece and rescue him before she accidentally destroys Olympus.

When Hercules vandalizes Eurythseus' temple and Eurythseus threatens war with the Olympians, the Oracle Pythia decides that Hercules must present him with a scale from the nine-headed serpent, Hydra, to make amends.

Despite the warnings of her friends at Mount Olympus Academy, Persephone befriends bad-boy Hades, but following her mother's advice to "go along to get along" complicates her relationships with all of them.