Reading Guides

The source uses this as its repeated starting point and strongly endorses it.

Continues the opening account of Horus's fall.

Completes the opening trilogy and its first major tragedy.

Introduces Garro and shifts viewpoint after the opening trilogy.

The author suggests skipping it, while acknowledging the major events it contains.

The source recommends this mainly for readers especially interested in the Dark Angels.

A strongly praised, self-contained Legion detour with wider-setting revelations.

The source advises skipping this volume.

Provides background on the Martian civil war; the guide considers it skippable.

The source mentions Titanicus for callbacks; it is outside this tracker's Horus Heresy corpus.

The author recommends the anthology, especially its selected stories listed below.

The source says to skip unless the Dark Angels are a particular interest; it is background for Angels of Caliban.

The source calls this a must-read and explicitly suggests jumping ahead to Prospero Burns next.

Paired by the source with A Thousand Sons despite the gap in publication numbering.

The guide makes this conditional on interest in assassins.

The source names this a must-read and a major turning point for the Heresy.

The anthology can be skipped; the author notes that some stories add background.

Grouped by the source among books that can be skipped.

Grouped as skippable background on Corax and the Raven Guard.

The guide explicitly calls the Battle of Calth a must-read.

The source recommends skipping this anthology.

Recommended mainly for Blood Angels readers; the guide notes material relevant to later stories.

Not required, but the source highlights several stories in the collection.

The source considers this skippable and frames it as a Fulgrim and Perturabo detour.

Although technically skippable, the author says not to skip this account of Angron and Lorgar's campaign.

The anthology is marked skippable. The original article prints its Roman number as XV; the bibliography identifies it as Book XXV.

The author suggests skipping unless Vulkan and the Salamanders are a special interest.

Begins the Imperium Secundus arc; the author recommends following that arc rather than skipping it.

The author had not read it at the time but had heard positive recommendations.

The source says it is not required, but may interest readers following Horus's point of view.

Listed in the guide's middle stretch without a specific recommendation.

The source lists this anthology among the middle books it had not fully assessed.

Listed in the guide's middle stretch without an individual recommendation.

The source lists this anthology in the middle stretch and does not assess it individually.

Continues the Imperium Secundus storyline; the author calls it non-essential but enjoyable. The source misprints its Roman volume as XXXVI; this catalog maps the title to its official Book 34 position.

Listed as one of the anthologies in the middle stretch, without an individual assessment.

The author had not read it; the guide notes its White Scars journey toward Terra.

Listed in the guide's broad middle stretch of anthologies, without individual assessment.

The source recommends it as the Dark Angels continuation and conclusion to the Imperium Secundus arc.

The source gives this a strong must-read recommendation.

A Raven Guard story collection; the author recommends it mainly for Raven Guard readers.

Explicitly identified as a must-read focused on the Emperor and the war on Terra.

A collection of Garro stories; the source says it is not required.

Collects the Tallarn stories and is presented as optional, especially for readers interested in armored warfare.

Continues Imperium Secundus and explains the Blood Angels' route toward Terra.

The author recommends it as the most useful Vulkan installment before the Siege.

The anthology is optional overall; the source singles out the story Perpetual as a useful bridge.

The author recommends it chiefly for Thousand Sons and Magnus readers.

The source is mixed on it overall but particularly recommends it to Space Wolves readers; it also supplies context for a plot point in Slaves to Darkness.

The guide calls this an excellent must-read on the traitor forces preparing to move on Terra.

The source suggests skipping unless the reader is especially interested in Titan warfare.

The author had not read it when writing the guide; the entry describes its subject but offers no recommendation.

The 2020 update says the Siege of Terra books should all be read; this is the first volume.

The Siege's second volume begins the ground assault on Terra.

The third Siege volume centers on the Lion's Gate spaceport battle.

The fourth Siege volume covered by the source's update.