FindMyTBR
Proving Grounds: Underworld, Book 4 (Unabridged)
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.
About Proving Grounds: Underworld, Book 4 (Unabridged)
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?
Where to listen & where it's available
Proving Grounds: Underworld, Book 4 (Unabridged) is available as an audiobook on Apple Books. We haven't confirmed it on Spotify yet — but you can still search there below.
Buy or compare copies of Proving Grounds: Underworld, Book 4 (Unabridged)
Retailer links open each store's page for this title. As an Amazon Associate, FindMyTBR may earn from qualifying purchases — see our affiliate disclosure.
More by Apollos Thorne
World Quest
Vampire Gate: Underworld, Book 5 (Unabridged)
Vanguard
Through the belly of the beast - Underworld - Eine LitRPG-Serie, Teil 2 (Ungekürzt)
Through the Belly of the Beast: Underworld, Book 2 (Unabridged)
The Underworld Collection: Volume 1: Underworld, Books 1-3 (Unabridged)
The Succubi: Underworld, Book 8 (Unabridged)
Survive Week One
Proving Grounds: Underworld, Book 4 (Unabridged) — frequently asked
- Is Proving Grounds: Underworld, Book 4 (Unabridged) on Spotify?
- We haven't confirmed Proving Grounds: Underworld, Book 4 (Unabridged) on Spotify's audiobook catalog yet. Spotify audiobooks are included with Premium (up to a monthly listening limit) in supported markets.
- Is Proving Grounds: Underworld, Book 4 (Unabridged) on Apple Books?
- Yes — Proving Grounds: Underworld, Book 4 (Unabridged) is available as an audiobook on Apple Books.
- Who wrote Proving Grounds: Underworld, Book 4 (Unabridged)?
- Proving Grounds: Underworld, Book 4 (Unabridged) is by Apollos Thorne.
- Where can I buy the Proving Grounds: Underworld, Book 4 (Unabridged) audiobook?
- Audible and Amazon both carry audiobooks; use the retailer links on this page to go straight to Proving Grounds: Underworld, Book 4 (Unabridged). For print copies, compare Bookshop.org, Barnes & Noble, and Books-A-Million.
FindMyTBR aggregates audiobook availability across Spotify, Apple Books, Audible, and Amazon so you can
move your Goodreads TBR to audio. Availability reflects titles we've confirmed; a service with no badge
just hasn't been confirmed yet. Covers via Open Library.
Search your whole Goodreads shelf →