Horus Heresy novels like Prospero Burns and Scars have not offered readers a nuanced view of Leman Russ—the Emperor's executioner and primarch of the Space Wolves. Good things come to those who wait, however. Here, at the 49th book in the series, readers finally get a look inside the head of the Russ. Accordingly, let's take a look at Wolfsbane (2018).
Wolfsbane opens on a moment in pre-Heresy history when the Emperor, accompanied by a young Horus, go to the ice planet of Fenris to an up and coming leader, one Leman Russ. Primitive, atavistic, brutish—Russ possesses little grace or etiquette, just an animal's mind reveling in battle and feast. Horus is put off by Russ' demeanor, but the Emperor informs him that Russ is his primarch brother, and that the two will need to work together in the future as part of the Great Crusade. Horus accepts Russ and puts his grudge aside. But its a grudge that must eventually be resolved. In Wolfsbane, it may decide the fate of the Heresy.