I decided to try out books from the Warhammer 40k universe, largely because there's just so many of them it felt like - if I liked them - I was set for semi-mindless reading for life. The book I was immediately able to find at my local library was Abnett's Eisenhorn Omnibus, which kind of presages this series, and I'm very glad I started with Abnett's Inquisitor work - I'm not enormously into military sci-fi, and these are very good pulp-y, noir-y works set in more interesting parts of the Warhammer universe. Both the Eisenhorn and Ravenor trilogies are essentially tragedies, in the Greek sense, but leaven that with good action sequences and fun world-building.