Set at the height of the Great Crusade, it introduces the idealistic Warmaster Horus and the noble Captain Garviel Loken.

– Rogal Dorn and the Alpha Legion clash in the Sol System. Complete Series List (1–54) Horus Rising Novel (Main Sequence) Descent of Angels Battle for the Abyss Mechanicum Tales of Heresy Fallen Angels Prospero Burns Age of Darkness The Outcast Dead Deliverance Lost Know No Fear The Primarchs Fear to Tread Shadows of Treachery Angel Exterminatus Mark of Calth Vulkan Lives The Damnation of Pythos Legacies of Betrayal War Without End Eye of Terra The Path of Heaven The Silent War Angels of Caliban Praetorian of Dorn The Master of Mankind Shattered Legions The Crimson King The Burden of Loyalty Born of Flame Slaves to Darkness Heralds of the Siege Titandeath The Buried Dagger Novel (leads to Siege of Terra streamlined path to reach the Siege of Terra faster? The Horus Heresy - Wikipedia

(Book 41): Provides the most direct (and controversial) look at the Emperor himself.