List of All Horus Heresy Books, "Warhammer 40K"

Warhammer 40,000 is closing out the Horus Heresy story after 17 years, kind of

New to The Horus Heresy? Here’s Everything You’ll Need to Get Started - Warhammer Community

Warhammer: The Horus Heresy Guide | TechRaptor

Warhammer: The Horus Heresy updates the 40K spin-off with a new edition later this year