Seven years of war culminate as the Horus Heresy reaches its climax. The Warmaster sets his sights on Terra itself, determined to strike down the Emperor and seize absolute control of the Imperium. With Chaos at his command, Horus has assembled an unstoppable force—but standing against him is Rogal Dorn, the stalwart primarch defending humanity's throne world. Before the final confrontation can begin, Horus must first conquer the Sol System and its vast network of fleets and fortifications. Thus begins the Solar War, the opening chapter of mankind's greatest trial.

Empowered by the forces of Chaos, Horus commands a vast legion bent on vengeance against the Emperor. Yet his path to Terra is barred by Rogal Dorn, the unwavering primarch who stands as the Throneworld's final bulwark. To reach his ultimate prize, the Warmaster must first breach the Sol System's formidable defenses—its fleets, its fortifications, its unbreakable will. The Solar War has begun, the opening salvo of humanity's darkest hour. Written by John French

Written by John French