Percy Jackson and the Olympians Series, 7 Books Set. The Lightning Thief, Sea of Monsters, Titan's Curse, Battle of the Labyrinth, Last Olympian, The Chalice of the Gods, Wrath of the Triple Goddess

Percy Jackson and the Olympians Series, 7 Books Set.

The Lightning Thief, 9780786856299
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.

Sea of Monsters, 9780786856862
Demi-god Percy Jackson and his friends must journey into the Sea of Monsters to save their camp. But first Percy will discover a secret that makes him wonder whether being claimed as Poseidon's son is an honor or a cruel joke.

Titan's Curse, 9781423101451
When the goddess Artemis disappears while hunting a rare, ancient monster, a group of her followers joins Percy and his friends in an attempt to find and rescue her before the winter solstice, when her influence is needed to sway the Olympian Council regarding the war with the Titans.

Battle of the Labyrinth, 9781423101468
When demonic cheerleaders invade his high school, Percy Jackson hurries to Camp Half Blood, from whence he and his demigod friends set out on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

Last Olympian, 9781423101475
The long-awaited prophecy surrounding Percy Jackson's sixteenth birthday unfolds as he leads an army of young demigods to stop Kronos in his advance on New York City, while the Olympians struggle to contain the rampaging monster, Typhon.

The Chalice of the Gods, 9781368098175
After saving the world multiple times, Percy Jackson is hoping to have a normal senior year. Unfortunately, the gods aren't quite done with him. Percy will have to fulfill three quests in order to get the necessary three letters of recommendation from Mount Olympus for college.
The first quest is to help Zeus's cup-bearer retrieve his goblet before it falls into the wrong hands. Can Percy, Grover, and Annabeth find it in time?

Wrath of the Triple Goddess, 9781368107631
Percy Jackson, now a high school senior, needs three recommendation letters from the Greek gods in order to get into New Rome University. He earned his first one by retrieving Ganymede's chalice. Now the goddess Hecate has offered Percy another "opportunity"–all he has to do is pet sit her polecat, Gale, and mastiff, Hecuba, over Halloween week while she is away. Piece of cake, right?

by Rick Riordan