Horus Heresy series is an epic 54-volume saga documenting the 31st Millennium's galaxy-spanning civil war that transformed the Imperium of Man. Starting with the rise of Warmaster Horus, the series details the betrayal of half the Space Marine Legions and the tragic fall of the Emperor’s dream for humanity. The Core Pentology (Books 1–5)
The is the definitive prequel saga to the Warhammer 40,000 universe, chronicling a galaxy-spanning civil war that occurred 10,000 years before the "modern" setting. Spanning 54 core novels published by Black Library between 2006 and 2019, this series details the tragic fall of the Warmaster Horus and the fracturing of the Imperium of Man. The Foundational Trilogy (Books 1-3) Warhammer 40k - Horus Heresy - Books 1-54 -comp...
If you read only those 17 books, you will understand 95% of the Heresy. Horus Heresy series is an epic 54-volume saga