I just finished reading "Chapter War," the 4th book in the Soul Drinkers series by Ben Counter. I think he's fast become my favorite 40k author. Dan Abnett is very good, but I think the Soul Drinkers series ranks with the best of the Horus Heresy Novels (Counter of course being the author of one of the titles in the series -- "Galaxy in Flames").
What do others think of the Soul Drinkers series and Counter in particular, or Black Library fiction in general?
(I will say one negative thing -- Black Library and Forge World publications have the most atrociously bad proofreading I've ever seen. I'm not confusing British spelling with mistakes, either. They just have some near-unbelievable typos.)