The Lost HeroOLD ENEMIES AWAKEN AS CAMP HALF-BLOOD'S NEW ARRIVALS PREPARE FOR WARWhen Jason, Piper and Leo crash land at Camp Half-Blood, they have no idea what to expect. Apparently this is the only safe place for children of the Greek Gods - despite the monsters roaming the woods and demigods practising archery with flaming arrows and explosives. But rumours of a terrible curse - and a missing hero - are flying around camp. It seems Jason, Piper and Leo are the chosen ones to embark on a terrifying new quest, which they must complete by the winter solstice. In just four days time. Can the trio succeed on this deadly mission - and what must they sacrifice in order to survive?The Son Of NeptunePercy Jackson, son of Poseidon, has come face to face with two snake-haired ladies who refuse to die.But they're the least of his problems. Because Percy finds himself at a camp for half-bloods, which doesn't ring any bells for him. There's just one name he remembers from his past. Annabeth.One thing is certain - Percy's adventuring days aren't over. He faces the most important quest of all: the Prophecy of Seven. If he fails, it's not just their camp at risk. Percy's old life, the gods, and the entire world might be destroyed . .The Mark of AthenaIn The Son of Neptune, Percy, Hazel, and Frank met in Camp Jupiter, the Roman equivalent of Camp Half-Blood, and traveled to the land beyond the gods to complete a dangerous quest. The third book in the Heroes of Olympus series will unite them with Jason, Piper, and Leo. But they number only six--who will complete the Prophecy of Seven?With old friends and new friends joining forces, a marvelous ship, fearsome foes, and an exotic setting, The Mark of Athena promises to be another unforge.