The Court of the Dead

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The Sun and the Star: A Nico di Angelo Adventure

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Wrath of the Triple Goddess

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The Chalice of the Gods

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

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9 From the Nine Worlds

Rick Riordan

The Ship of the Dead

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The Hammer of Thor

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The Sword of Summer

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Percy Jackson's Greek Heroes

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Percy Jackson's Greek Gods

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The Tower of Nero

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Camp Jupiter Classified: A Probatio's Journal

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The Tyrant's Tomb

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The Burning Maze

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

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The Dark Prophecy

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The Hidden Oracle

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The Demigod Diaries

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The Blood of Olympus

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The House of Hades

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The Mark of Athena

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The Son of Neptune

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The Lost Hero

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The Kane Chronicles Survival Guide

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Demigods & Magicians: Percy and Annabeth Meet the Kanes

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The Crown of Ptolemy (Demigods & Magicians, #3)

Rick Riordan

The Staff of Serapis (Demigods & Magicians, #2)

Rick Riordan

The Son of Sobek (Demigods & Magicians, #1)

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

Rick Riordan