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.

Athena and Hermes' search for the cause of their unexpected, life-threatening illnesses leads them to Cassandra, a former prophetess, who may be key to a war started by Hera and other Olympians who have become corrupt anti-gods determined to destroy their rivals.

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.

"What if Meg had to become a Greek god? After Hercules proves he's a true hero and regains his godship, all seems right in the world. That is, until Zeus tells Meg that she can't be with Hercules because she's, well, mortal. Luckily, Hera has a solution, offering Meg a chance to prove herself worthy of a spot on Mt. Olympus--as a god. All Meg has to do is complete a mysterious quest. The mission? Oh, just to rescue her ex's current wife from the Underworld....

"At the conclusion of The Mark of Athena, Annabeth and Percy tumble into a pit leading straight to the Underworld. The other five demigods have to put aside their grief and follow Percys instructions to find the mortal side of the Doors of Death. If they can fight their way through the Gaeas forces, and Percy and Annabeth can survive the House of Hades, then the Seven will be able to seal the Doors from both sides and prevent the giants from raising...