Madeline E. George

When Harleen Quinzel wakes up in a hospital bed with no recollection of the past few months, she scrambles to pick up the pieces of her life. As she works desperately to overcome her amnesia, she learns what happened during her freshman year. . . . As she starts classes at Gotham University and an internship at Arkham Asylum, Harleen is determined to make her mark, getting paired with the most high-profile female inmate at Arkham—the notorious Talia al Ghūl. Talia is brilliant and fascinating, and as they spend more time together, the lines between good and bad begin to blur.

Though the Greek and Roman crewmembers of the Argo II have made progress in their many quests, they still seem no closer to defeating the earth mother, Gaea. Her giants have risen - all of them - and they're stronger than ever. They must be stopped before the Feast of Spes, when Gaea plans to have two demigods sacrificed in Athens. She needs their blood - the blood of Olympus - in order to wake.

Thirteen-year-old Steven has a totally normal life (well, almost): he drums in the All-Star Jazz Band, has a crush on the hottest girl in school (who doesn’t know he’s alive), frequently finds himself sitting across from his school counselor (who bribes him with candy), and is constantly annoyed by his five-year-old brother, Jeffrey (who is cuter than cute). But when Jeffrey gets sick, Steven’s world is turned upside down as he is forced to deal with his brother’s illness, his parents’ attempts to keep the family in one piece, the band, overdue homework, girls, and of course, Dangerous Pie.

In The Lost Hero, three demigods named Jason, Piper, and Leo made their first visit to Camp Half-Blood, where they inherited a quest.