The Eisenhorn Series
by Dan Abnett
I've been rather deep into the Warhammer 40K universe for a few years now, but had never taken the time to read any of the books. After some research I settled on the Eisenhorn series. The story is part Investigator/Noir, party gritty grim sci-fi. I picked it because it sounded like the series The Dresden Files but set in the WH40K universe. Loosely that is actually what I got. They are all well written, but they also all have a somewhat common issue, that I'll get into in a minute.,
The character of Eisenhorn is an Inquisitor of the Imperium (think Spanish Inquisition but where demons are manifestly real and terrifying). The first three books take place over about 150 years, with about a 100 year jump between book 1 and 2, and then 50 years between book 2 and 3.
The book series, interestingly follows a roughly continuous story arc, but each book takes place decades apart. The first three books are written from the perspective of Eisenhorn after-action reports to his superiors, though more like memoirs than dry and formulaic, and the last book is written from a more classic perspective, but it is from the perspective of a biologist who gets caught up in an Eisenhorn investigation. This 4th book is a very interesting turn for the series.
There are a few reasons why I find book 4 interesting, partly from the perspective shift, but also from the expansion, in my mind, of the whole WH40K universe. In book 4 "The Magos" (Magos being term loosely meaning 'scientist') Eisenhorn is very old, hard and grim, by this late in life he is what is known as an "Alpha Psycher" which would also loosely translate to master wizard in a fantasy setting. The injuries and scars, physical and mental, clearly have taken their toll on him, and he is nearing the end of his life. He is a very distant and cold character in relation to the main character, but having read the series the reader will have far more understanding on Eisenhorn's character that might have been impenetrable were this book a stand alone, or require some standard speech somewhere along the way where Eisenhorn opens up to The Magos to explain why he is so grim and callous, something not necessary given the readers knowledge going in.
But the most interesting thing, as a WH40K fan, may seem simple, and formulaic in any other setting, is that the main character, who spent most of his life in isolation on a solitary assignment to document wildlife on a backwater planet, seems oblivious to (waving hands generally)
all of the reality of the WH40K universe. To him demons and "The Warp" are just fairy stories, and most of the Xenos incursions, and history of the war with (waving hands generally)
everything is just state propaganda. I find this interesting because I have never considered in that in the WH40K universe there would be places in the Imperium of Man that had not been touched by the war in generations. It makes some sense on reflection, the Imperium is too big to properly conceptualize. Millions of worlds, trillions of citizens, it would stand to reason that there were places that might not be touched by war for generations and grow to see the larger war as something of a fairy tale.
It's a good series and written well with great characters. It never drags, and Abnett is good at writing action that doesn't become confusing, and dialogue discussing human nature that doesn't drift into the unbelievable.
It's hard to know at this point if these books can be recommended to people who have no experience in the WH40K universe, since there is are a lot of words and concepts that are presented that I would guess are confusing to a new comer.