It has been ages since I last read something from the Horus Heresy series. Coincidentally, that happened to be Graham McNeill’s The Vengeful Spirit. And now finally, after a gap of some three years, I’m returning to the series that I fell in love with almost ten years ago. After catching myself back up with the Legacies of Betrayal anthology, I dived head-on into the latest release, The Crimson King by Graham McNeill, which carries on from A Thousand Sons, finally continuing a story almost five years old. The Crimson King does a lot to flesh out how the Thousand Sons legion fully turned away from the Emperor and how it “healed” itself after the terrible fall of Prospero. For any fan of the XVth Legion, this novel is a must-read.