Black Library’s Horus Heresy series is a big beast, there’s no doubt about it. From fairly humble beginnings it’s grown and grown, to the point that there have now been over 50 separate releases in the series. As a nice gesture to those die-hard fans who have invested big bucks for the beautiful limited edition of the new graphic novel, Macragge’s Honour, each person who has bought a copy has received a free short story in ebook format. That story is a pre-Heresy tale featuring Horus and his Luna Wolves legion taking on an enormous ork scrapfleet. With the help of The Emperor of Mankind. And yes, it’s brilliant.