The Horus Heresy: Primarchs
Shown by first publication year; this may not be reading order.
Roboute Guilliman: Lord of Ultramar
Magnus the Red: Master of Prospero
Leman Russ: The Great Wolf
Perturabo: Hammer of Olympia
Lorgar: Bearer of the Word
Grandfather's Gift
Perturabo: Stone and Iron
Malcador: First Lord of the Imperium
Konrad Curze: A Lesson in Darkness
Vulkan: Lord of Drakes
Sons of the Emperor
Ferrus Manus: The Gorgon of Medusa
Fulgrim: The Palatine Phoenix
Jaghatai Khan: Warhawk of Chogoris
Konrad Curze: The Night Haunter
Corax: Lord of Shadows
Angron: Slave of Nuceria
Scions of the Emperor
Ghost of Nuceria
The Passing of Angels
The Abyssal Edge
Mercy of the Dragon
Illyrium
The Revelation of the Word
Morningstar
Lion El'Jonson: Lord of the First
Child of Chaos
Blood of the Emperor
Alpharius: Head of the Hydra
Mortarion: The Pale King
Sanguinius: The Great Angel
Rogal Dorn: The Emperor's Crusader