Chaos Space Marines Research

Since finishing up my last Horus Heresy novel, book L, I have elected to read more about the Black and Alpha legions in the post-Heresy period of the Imperium of Man.

It can be hard to pin down when these take place, but its safe to assume the ones around the Black Legion are in the first few millennia of the post-Heresy period, and that the ones about the Alpha Legion are happening in M41, or perhaps even M42.

Extinction is set in the period where the Sons of Horus are being persecuted by the Emperor's Children and other traitor legions and warbands. Abaddon has abandoned them, and is making a pilgrimage across the Eye of Terror to find himself, as it were.

Abaddon: Chosen of Chaos is just a scene or two from the point of view of Khayon, the POV character of the Black Legion series. Curiously, it is set later in the timeline than either of the existing books, and likely even the next one in the series, since Abaddon appears to be in posession of the daemon sword Drach'nyen in this story.

Unearthed is the story of an interrogator in the Inquisition doing his best to foil an Alpha Legion warband that have decimated an imperial planet. In the end, he appears to have been able to remotely trigger a self-destruct sequence in his own ship, killing the Alpha Legion that have taken it over. Their leader is a character who was at least mentioned in the book I am reading now:

Sons of the Hydra. This is an interesting tale of an Alpha Legion warband made of entirely of space marines who were once members of other legions or chapters. One came from the Night Lords, one from the Dark Angels' Fallen faction, one from a now wiped out Ultramarines successor chapter, and so on. They are being led on a quest to steal a warp artefact of some sort from the Word Bearers to supposedly deliver it to whoever is currently leading the overall Alpha Legion. We'll see how that turns out, of course.

Truth is my Weapon was basically just an Inquisitor interrogating a captured Alpha Legionnaire, and eventually executing him, done stylistically, of course.

We are One is the story of an Inquisitor who is tracking the Alpha Legionnaire Phocron... to the end of his career.

Hunted is centered around an Imperial Guardsman who is being used in ways he doesn't quite understand by an Inquisitor to track down cultists from within their cells.