Sean Barett has narrated 4 audiobooks on Listento.it by 3 authors, with an average listener rating of 5★ across 12 ratings. The most-rated is Trials of Azrael.

As war rages in the Pandorax system, the Imperial battleship Revenge comes under attack by the dread forces of Chaos. As warriors of the Black Legion rampage through the venerable craft, Supreme Grand Master Azrael leads the First Company of the Dark Angels - the elite Deathwing - onto the vessel to eliminate the enemy. Separated from his men, Azrael finds himself trapped in the lower decks with only a tech-priest for company and one of the galaxy's most fearsome warriors hunting him: the infamous Khârn the Betrayer.
©2013 Games Workshop Limited (P)2013 Games Workshop Limited

On the war-torn world of Armageddon, Gabriel Seth and his Flesh Tearers accompany an Imperial inquisitor and her retinue on a mission of vital importance. But the inquisitor has a hidden agenda that could imperil not only Seth's mission but the very existence of his Chapter...unless he takes drastic action.
©2013 Games Workshop Limited (P)2012 Games Workshop Limited

In the depths of Calth's arcology network, the Underworld War has raged for years. Aeonid Thiel, previously an honoured sergeant of the Ultramarines, once again finds himself in trouble. Pitted against the daemonic forces of the Word Bearers, he has no choice but to venture back to the ravaged surface and brave the deadly solar flares that have scoured all life from this world. With a lowly Imperial Army trooper as his only companion, it falls to him to drive the maniacal Dark Apostle Kurtha Sedd and his warband from the overrun XIII Legion stronghold.
©2013 Games Workshop Limited (P)2017 Games Workshop Limited

When the world of Stern's Remembrance comes under attack by the forces of Chaos, Dark Angels Master Zadakiel leads a squad of Terminator armour-clad Deathwing to purge the traitors and their dark master.
©2012 Games Workshop Limited (P)2010 Games Workshop Limited