The Iron Warriors series in Warhammer 40,000 runs to 3 books. Below is the full reading order in series sequence, so you know exactly where to start Iron Warriors and what to read next.
Original summaries and chronology labels generated from the same catalog powering the atlas.
Graham McNeill
The Iron Warriors, masters of siegecraft, lay siege to a heavily fortified Imperial citadel world in a grinding campaign of attrition and artillery. The narrative follows both the relentless traitor legionaries and the desperate defenders, building toward a brutal clash of bunkers, breaches, and betrayal. It is widely regarded as one of the definitive Chaos Space Marine siege novels.
667.M41 - 999.M41
era date, medium confidence
Ian St Martin
After his Marauder bomber is shot down, a traumatized young airman finds an unlikely refuge aboard a Cadian Leman Russ battle tank, joining its cynical, battle-worn crew as a raw gunner. Cut off from their lines amid the horrors of the Crimson Slaughter during the 13th Black Crusade, the tankers must endure and survive against relentless Chaos butchery. Ian St Martin delivers a gritty, claustrophobic armored-warfare novella from the perspective of the Imperial Guard.
667.M41 - 999.M41
era date, medium confidence
Graham McNeill
The half-breed Iron Warrior Honsou wages a brutal campaign of vengeance, marshalling his renegade host to break the defences of those who have crossed him. A grim audio-driven tale of siegecraft and spite, it follows the traitor warsmith's relentless drive to tear down anything that stands in his way.
667.M41 - 999.M41
era date, medium confidence