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Riordanverse Companion Stories and Extensions

publication Order for Percy Jackson and the Olympians

Optional stories and connected extensions across the Riordanverse, arranged by publication date. These books add character moments, crossovers, and setting context; they are not prerequisites for the main series routes. Follow each series guide for the core reading sequence.

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1
Cover of Percy Jackson: The Demigod Files

Percy Jackson: The Demigod Files

2009

Optional Companion / Extension

Optional companion stories from the Percy Jackson years; read after The Battle of the Labyrinth or save until after the original five-book arc.

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2
Cover of The Demigod Diaries

The Demigod Diaries

2012

Optional Companion / Extension

Optional stories set around the early Heroes of Olympus books; read after The Son of Neptune.

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The Demigod Diaries

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3
Cover of Percy Jackson and the Greek Gods

Percy Jackson and the Greek Gods

2014

Optional Companion / Extension

Optional Percy-narrated Greek mythology retellings; not a plot installment.

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Percy Jackson and the Greek Gods

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4
Cover of Percy Jackson and the Greek Heroes

Percy Jackson and the Greek Heroes

2015

Optional Companion / Extension

Optional mythology companion, following Percy Jackson and the Greek Gods by publication.

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Percy Jackson and the Greek Heroes

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5
Cover of Demigods and Magicians

Demigods and Magicians

2016

Optional Companion / Extension

Optional Greek/Egyptian crossover; read the Percy Jackson and Kane Chronicles series first.

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Demigods and Magicians

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6
Cover of Camp Half-Blood Confidential

Camp Half-Blood Confidential

2017

Optional Companion / Extension

Optional Camp Half-Blood companion with setting notes and short stories.

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Camp Half-Blood Confidential

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7
Cover of 9 from the Nine Worlds

9 from the Nine Worlds

2018

Optional Companion / Extension

Optional Magnus Chase story collection; read after The Ship of the Dead.

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9 from the Nine Worlds

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8
Cover of Camp Jupiter Classified

Camp Jupiter Classified

2020

Optional Companion / Extension

Optional Camp Jupiter journal; placed after The Tyrant’s Tomb.

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Camp Jupiter Classified

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9
Cover of The Sun and the Star

The Sun and the Star

2023

Optional Companion / Extension

Optional Nico di Angelo spin-off; read after Heroes of Olympus and Trials of Apollo.

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The Sun and the Star

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10
Cover of The Court of the Dead

The Court of the Dead

2026

Optional Companion / Extension

Continue the Nico di Angelo Adventures after The Sun and the Star.

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The Court of the Dead

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11
Cover of The Wild Zone

The Wild Zone

2026

Optional Companion / Extension

A separate Camp Half-Blood starting route, co-written by Rick Riordan and Annabelle Oh.

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The Wild Zone

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