The House of Hades (Heroes of Olympus, Book 4)

Camp Half-Blood Confidential

The Tower of Nero (The Trials of Apollo, Book 5)

9 From the Nine Worlds: Magnus Chase and the Gods of Asgard

The Sun and the Star: A Nico di Angelo Adventure

Demigods & Magicians: Percy and Annabeth Meet the Kanes

Daughter of the Deep

The Cursed Carnival and Other Calamities: New Stories About Mythic Heroes

The Heroes of Olympus

In 'The Mark of Athena', the Greek and Roman demigods from the Prophecy of Seven must work together to prevent the earth goddess Gaia from waking. The demigods must sail on the Argo II to the ancient lands to find Athena Parthenos. Annabeth Chase, daughter of Athena, must follow the Mark of Athena and face a series of challenges on her own to reunite the Greek and Roman camps and bring peace.

Discover Your Child's Next Read

The House of Hades (Heroes of Olympus, Book 4)

Rick Riordan, 2013

Camp Half-Blood Confidential

Rick Riordan, 2017

The Tower of Nero (The Trials of Apollo, Book 5)

Rick Riordan, 2020

9 From the Nine Worlds: Magnus Chase and the Gods of Asgard

Rick Riordan, 2018

The Sun and the Star: A Nico di Angelo Adventure

Rick Riordan, Mark Oshiro, 2023

Demigods & Magicians: Percy and Annabeth Meet the Kanes

Rick Riordan, 2016

Daughter of the Deep

Rick Riordan, 2021

The Cursed Carnival and Other Calamities: New Stories About Mythic Heroes

Roshani Chokshi, Rick Riordan, J.C. Cervantes, 2021