Vengeful Spirit

Horus takes his Legion to the world of Molech, convinced that it holds a truth about the Emperor that could decide the war. The planet's defenders, among them its ancient Knight houses, stand in his way, and not all of them will stay loyal.

Far from the front, Malcador the Sigillite and Leman Russ are planning a blow aimed at the Warmaster in person. Garviel Loken, now one of Malcador's Knights Errant, leads a small team of Legion outcasts on a covert mission aboard the Vengeful Spirit, Horus's own flagship. Graham McNeill's twenty-ninth Horus Heresy novel.