"The Greek and Roman demigods must simultaneously prevent the earth mother, Gaea, from waking and stop war from breaking out at Camp Half-Blood"--Provided by publisher.

Percy hurries to Camp Half-Blood after his high school is invaded by demonic cheerleaders, and joins his demigod friends on a quest through the Labyrinth, while the war between the Olympians and the evil Titan lord Kronos draws near.

"Adelina Amouteru survived the blood fever, a deadly illness that killed many, but left others with strange markings and supernatural powers. Cast out by her family, Adelina joins the secret society of the Young Elites and discovers her own dangerous abilities"--Provided by publisher.

After the events of the Fourth Trial, Martial soldiers hunt the two fugitives as they flee the city of Serra and undertake a perilous journey through the heart of the Empire. Laia is determined to break into Kauf - the Empire's most secure and dangerous prison - to save her brother, who is the key to the Scholars' survival. And Elias is determined to help Laia succeed, even if it means giving up his last chance at freedom. But dark forces, human and...

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.