>>723734894
Black Library often meanders in odd wayd.
Pic related is about an Imperial clerk turned Propagandist who is sent to a Death World for an assignment and learns the horrors of war firsthand, witnessing the Guard being shoved into a bloody meatgrinder of a campaign in which the planet itself literally rips men to shreds before they even get to the Orks, who are portrayed as an unrelenting and nigh insurmountable menace that they only barely manage to ward off with colossal casualties.

>>717785648
It's notably a sequel to another book, Outgunned, which is about the Aeronautica fighting Orks. It's not mandatory I think, but it does introduce the characters a bit.
Both are from the PoV of an Imperial Propagandist, hence the 'heroic' covers despite the contents.