The unannounced Diablo novel has been revealed! Diablo IV: The Lost Horadrim is written by Matthew J. Kirby — who wrote Diablo: Book of Lorath (2023). The novel is set in the Skovos Isles, serving as a prequel to Diablo IV: Lord of Hatred. However, the book description establishes the story is set in the past rather than based on current events. Donan and Tyrael are alive in this novel. Pre-order now.

UPDATE (March 2, 2026) — The pre-order page has been updated to reveal that Ralph Ineson narrates the audiobook version. In Diablo IV, the narrator voices Lorath. Most recently, he appeared in Marvel’s Fantastic Four: First Steps as Galactus and Netflix’s Frankenstein as Professor Krempe. The audiobook is estimated to be 10 hours long.

Ralph Ineson - Lorath voice actor

Diablo IV: The Lost Horadrim Novel Description

“Before they can rebuild, they must unearth the past”

In a world culled by Malthael’s Reaping, the Horadric order—humanity’s only hope—struggles to gain a foothold. Within the dimming lands of Sanctuary, evils rise from all corners, and though the Horadrim are used to facing down the darkest spawn of the Burning Hells, they are far less prepared for the depravity arising within their fellow men. But as Lorath, Donan, and Tyrael seek justice and a path forward, the Horadrim’s numbers have dwindled, leaving humanity vulnerable.

Hoping to strengthen the order, Tyrael and the two mages set sail to Skovos, where Sho-Ren and four other Horadrim were sent years ago to establish diplomatic relations with the Askari . . . and were never heard from again. Though the risk is great, the chance of reclaiming kin—as well as the Horadric vault hidden deep within the heart of the isles—remains too great an opportunity to pass up.

At first glance, Skovos appears to have escaped the devastation so many others faced in the wake of the Reaping. But as the Horadrim attempt to ally with the Askari and their rulers, it becomes clear that all is not right on their shores. To gain the trust of the Amazon warriors, Lorath seeks the aid of their captain, Adreona. The Askari leader does not trust the mysterious mainlander, though—not while her soldiers are under constant threat of the Drowned and can ill afford distractions.

To save both their peoples, Lorath and Adreona must learn to battle together against not only the perils before them . . . but also those lurking just beneath the surface.

Publisher: Random House Worlds
Publication date: April 21, 2026
Print Length: 272 pages
ASIN: B0FJD7KVJ9
ISBN-13: 978-0399594076