Universe Quest: Rick Riordanverse

The Wild Zone

Rick Riordan

The Kane Chronicles Survival Guide

Rick Riordan

Percy Jackson & the Olympians: The Ultimate Guide

Rick Riordan

Brooklyn House Magician's Manual: Your Guide to Egyptian Gods & Creatures, Glyphs & Spells, and More (The Kane Chronicles)

Rick Riordan

Percy Jackson's Greek Heroes

Rick Riordan

Percy Jackson's Greek Gods

Rick Riordan

9 From the Nine Worlds

Rick Riordan

Camp Jupiter Classified: A Probatio's Journal

Rick Riordan

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

Rick Riordan

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

Rick Riordan

Demigods & Magicians: Percy and Annabeth Meet the Kanes

Rick Riordan

The Demigod Diaries

Rick Riordan

The Demigod Files

Rick Riordan

The Court of the Dead

Rick Riordan

The Tyrant's Tomb

Rick Riordan

The Burning Maze

Rick Riordan

The Dark Prophecy

Rick Riordan

The Red Pyramid

Rick Riordan

The House of Hades

Rick Riordan

The Mark of Athena

Rick Riordan