After the betrayal at Isstvan, Horus begins his campaign against the Emperor, a galaxy-wide war that can lead only to Terra. But the road to the final confrontation between father and son is a long one – seven years filled with secrecy and silence, plans and foundations being formed across distant stars. An unknown history is about to be unveiled as light is shed on the darkest years of the Horus Heresy, and revelations will surface that will shake the Imperium to its very foundation...
Rules of Engagement by Graham McNeill
Liar's Due by James Swallow
Forgotten Sons by Nick Kyme
The Last Remembrancer by John French
Rebirth by Chris Wraight
The Face of Treachery by Gav Thorpe
Little Horus by Dan Abnett
The Iron Within by Rob Sanders
Savage Weapons by Aaron Dembski-Bowden
A mixed bag
A handful of these stories are interesting and well written - some definitely less so. I like the idea of more short stories to fill out the epic scale of the Heresy series but to be honest some of them are just poorly written and by the numbers excuses to pit small numbers of Astartes against each other. The best stories here tend to avoid long battle scenes - there's two interrogations and a (thankfully) one story without a single space marine at all seeing everything from a much lowlier perspective. I think these mostly introduce some characters that are in later novels which may make some of the dull stories worth reading.