book cover of Proving Grounds
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Proving Grounds

(2020)
(The fourth book in the Underworld series)
A novel by

 
 
Book 4 of the Amazon Best Selling Underworld series!

The minotaurs are dead. Mistress Nava has no choice. She’ll have to take matters into her own hands to put an end to Elorion and his friends.

Join Elorion as he searches for the power to challenge their deadliest enemy yet. Whether he finds it inside himself or in some legendary weapon, will it be enough to end a Mistress level monster once and for all?

Genre: GameLit

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Used availability for Apollos Thorne's Proving Grounds

Audio Editions

May 2020 : USA Audio edition
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Title: Proving Grounds: Underworld, Book 4
Author(s): Apollos Thorne
Publisher: Podium Audio
Availability: Amazon   


May 2020 : Australia Audio edition
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Title: Proving Grounds: Underworld, Book 4
Author(s): Apollos Thorne
Publisher: Podium Audio
Availability: Amazon AU   


May 2020 : Canada Audio edition
thumb

Title: Proving Grounds: Underworld, Book 4
Author(s): Apollos Thorne
Publisher: Podium Audio
Availability: Amazon CA   


May 2020 : UK Audio edition
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Title: Proving Grounds: Underworld, Book 4
Author(s): Apollos Thorne
Publisher: Podium Audio
Availability: Amazon UK   


Kindle Editions

February 2020 : USA, Australia, Canada, UK Kindle edition
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Title: Underworld - Proving Grounds: A LitRPG Series
Author(s): Apollos Thorne
Publisher:
Availability: Amazon   Amazon UK   Amazon CA   Amazon AU