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.

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.

Slither lurks in woods and towns, hunting for human blood, but before he can feast on three lovely sisters, their dying father binds the monster to a bargain.

Fifteen-year-old Izzy, who comes from a long line of monster hunters, investigates a series of hauntings at her new high school.

Teen triplets Gretchen, Grace, and Greer, descendants of Medusa, continue to battle the monsters who walk the streets of San Francisco, unseen by humans, but realize they must enter the abyss if they are to protect their loved ones--and their world.

Now separated, sixteen-year-old indentured beastkeeper Koffi and seventeen-year-old warrior candidate Ekon will have to find their way back to each other as they face off against the god of death

In the final battle for Heaven and Earth, Ellie, who has the reincarnated soul of an ancient reaper-slayer, must grapple with her archangel powers to save herself and all of humanity.

"No one know death like Tea. A bone witch who can resurrect the dead, she has the power to take life ... and return it. And she is done with her self-imposed exile. Her heart is set on vengeance, and she now possesses all she needs to command the mighty daeva. With the help of these terrifying beasts, she can finally enact revenge against the royals who wronged her--and took the life of her one true love. But there are those who would use Tea's dark...

In a kingdom called the Dells, Fire is the last human-shaped monster, with unimaginable beauty and the ability to control the minds of those around her, but even with these gifts she cannot escape the strife that overcomes her world.