The Demigods of Olympus: An Interactive Adventure

From Percy Jackson: Camp Half-Blood Confidential: Your Real Guide to the Demigod Training Camp (Trials of Apollo)

Demigods and Monsters: Your Favorite Authors on Rick Riordan's Percy Jackson and the Olympians Series

The Heroes of Olympus: The Demigod Diaries (Heroes of Olympus, The)

Percy Jackson: The Demigod Files (A Percy Jackson and the Olympians Guide)

For Magnus Chase: Hotel Valhalla Guide to the Norse Worlds: Your Introduction to Deities, Mythical Beings, & Fantastic Creatures (Magnus Chase and the Gods of Asgard)

Percy Jackson's Greek Heroes (A Percy Jackson and the Olympians Guide)

Percy Jackson and the Singer of Apollo (Trials of Apollo)

Percy Jackson's Greek Gods (A Percy Jackson and the Olympians Guide)

The Crown of Ptolemy (Heroes of Olympus, The)

The Son of Sobek: A Disney Hyperion Short Story