Book 1

Immortal Guardians

by Eliot Schrefer

Published 11 August 2015
When an ancient dark force emerges from a centuries-long slumber, Conor, Abeke, Meilin, and Rollan must stop it from sweeping through Erdas and destroying their spirit animals--and the world.

Book 2

Broken Ground

by Victoria Schwab

Published 22 December 2015
Something ancient and evil has awoken from beneath the world of Erdas. Shrouded in shadow and older than memory, just a sliver of its power can destroy with a touch. Even the spirit animal bond, the sacred link between humans and animals that keeps Erdas in balance, is under threat. Four young heroes, Conor, Abeke, Meilin, and Rollan, are determined to stop it. Together with their spirit animals, they embark on a desperate journey that takes them deep underground and to the far corners of the world. As friends and allies fall around them, the four have no choice but to push forward and confront this darkness. If they stop to look back, they'll see the truth: Evil already has them surrounded.

Book 3

The Return

by Varian Johnson

Published 26 April 2016
A new threat faces the world of Erdas in this continuation of the
New York Times bestselling series.

Part engrossing book series, part action role-playing game - discover
your spirit animal and join the adventure.

Book 4

A dark threat faces the world of Erdas in this riveting new saga
from the New York Times bestselling series.

Book 5

The four heroes of Erdas are fugitives on the run in this new chapter
of the New York Times bestselling series!

Book 6

The Wildcat's Claw

by Varian Johnson

Published 10 October 2017

Continues the adventures of Conor, Abeke, Meilin, and Rollan and their spirit animals as they continue their efforts to protect Erdas from dark forces.


Book 7

Follow the four heroes of Erdas in this new chapter of the New York
Times bestselling series!

Book 8

The Dragon's Eye

by Sarwat Chadda

Published 24 April 2018

The four young Greencloaks Conor, Abeke, Meilin, and Rollan, have been captured by the Oathbound and framed for a crime they didn't commit. Rather than facing trial, they and their spirit animals find themselves smuggled to a remote palace. They discover that someone has been manipulating all of the leaders to uncover a powerful relic with the potential to flood the entire world. The heroes will need absolute faith in their spirit animals to stop this conspiracy and save all from drowning.