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 to be set in the past rather than based on current events. Donan and Tyrael are alive in this novel. Pre-order now.

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

The Horadrim must journey to the Skovos Isles to discover the fate of a long-lost expedition in this official prequel novel to Diablo: Lord of Hatred.

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.

Publisher: Random House Worlds

Publication date: April 21, 2026

Print Length: 272 pages

ASIN: B0FJD7KVJ9

ISBN-13: 978-0399594076