Riordan, Rick

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.

The disappearance of the goddess Artemis while out hunting a rare, ancient monster, prompts a group of her followers to join 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.

Apollo has been cast out of Olympus by his father, Zeus, and given a human name and identity--he is now Lester, a pathetic mortal, whose birthday is April eighth. So says his horrendous driver's license. On Earth, Apollo-Lester must face the imminent attack on Camp Jupiter by the emperors Caligula and Commodus, face down the evil Blood Moon king and his armies of the undead, and suffer the wrath of the Cumaean Sibyl, who still hasn't forgiven him.

The Greek god Apollo, cast down to earth as the ungifted human teenager Lester Papadopoulos, and his demigod friends must go through the Labyrinth to find the third emperor--and an Oracle who speaks in word puzzles--somewhere in the American Southwest.

In the second trial, Apollo/Lester must travel to the American Midwest in order to find the most dangerous Oracle before the second member of the evil Triumvirate does. Along the way Apollo will learn more about friendship as he travels with Calypso, Festus, and Leo.

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.

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.

Percy Jackson and the other residents of Camp Half-Blood provide a behind-the-scenes look at Camp Half-Blood for prospective and new campers about life at the camp.

Annabeth has been away from Percy for six months, but at last she and he are about to be reunited. However, Annabeth fears Percy's time at Camp Jupiter may have turned him to the Roman ways instead of the Greek, and that he may no longer need her even if she needs him. Annabeth has been tasked by her mother, Athena, with following Athena's mark to get revenge on her mother's enemies--on top of Annabeth and the other demi-gods' task of fulfilling the prophecy and sealing the Doors of Death.