Born to a life of political conflict, Perturabo was always considered a child prodigy among the people of Olympia – indeed, his philosophical and scientific works were beyond compare. The fourth book in The Primarchs, Perturabo - The Hammer of Olympia is written by Guy Haley. Will he remain true to their mutual aims, or divert his own efforts towards furthering his own mastery of the warp? Book cover currently not finalized. Now, fighting alongside his brother Perturabo of the Iron Warriors Legion, Magnus begins to foresee an approaching nexus of fate. A Psyker without peer, save only for the Emperor himself, he commands his loyal followers of the Thousand Sons Legion in the Great Crusade, always vigilant for any lost knowledge they might recover from the remains of dead human civilisations. Lord of the mystical and uncanny, Magnus the Red has long studied the ancient crafts of sorcery. The third book in The Primarchs, Magnus the Red - The Master of Prospero is written by Graham McNeill and contains information on Magnus the Red and the Thousand Sons Legion. With the might of two Legions arrayed against Durath, tensions nevertheless run high, and the rivalry between the Wolf and the Lion threatens to engulf them all.ģ. Enraged by the defiance of the tyrant Durath, Russ has pledged to strike him down personally but his brother Lion El'Jonson, Primarch of the Dark Angels Legion, advises more caution. At the height of the Great Crusade, his Space Wolves fight to bring the rebel world of Dulan to Compliance. Many are the sagas of Leman Russ, Lord of Winter and War, most fearsome of the Emperor's Primarch sons. The second book in The Primarchs, Leman Russ - The Great Wolf is written by Chris Wraight and contains information on Leman Russ and the Space Wolves Legion. Now, facing a rival empire on the Ork-held world of Thoas, Guilliman must choose his weapons carefully – otherwise his dream of a brighter future could be lost forever. Even after learning of his true heritage as a Primarch son of the Emperor of Mankind, he strove to expand his domain as efficiently and benevolently as possible, with the XIII Legion Ultramarines as his alone to command. Long before the coming of the Imperium, the realm of Ultramar was ruled by Roboute Guilliman, the last Battle King of Macragge.

The first book in The Primarchs, Roboute Guilliman - Lord of Ultramar is written by David Annandale and contains information on Roboute Guilliman and the Ultramarines Legion. Official synopses for all books are as follows:

The following is a list of the current and upcoming titles in the main Horus Heresy: Primarchs series:

Horus heresy books in order