5.The Keys of HelShort Story·John French·2015·Horus HeresyThe Keys of HelShort StoryJohn French·2015☆☆☆☆☆
7.The NooseShort Story·David Annandale·2015·Horus HeresyThe NooseShort StoryDavid Annandale·2015☆☆☆☆☆
9.The Seventh SerpentNovella·Graham McNeill·2014·Horus HeresyThe Seventh SerpentNovellaGraham McNeill·2014☆☆☆☆☆
11.The EitherAudio Drama·Graham McNeill·2016·Horus HeresyThe EitherAudio DramaGraham McNeill·2016☆☆☆☆☆