The Grey Knights are an interesting chapter and one I know little about (aside from their having AWESOME looking minis) so I decided to pick this up and read it. After all, everything you want to know about the GK's in one big book, rock. I don't know the reps of most WH40K authors and usually I don't care. Most fan bases tend to polarize when it come to authors ranking some as gods and some as hacks often for the smallest flub in a story. Occasionally it's warranted, sometimes not. Apparently Ben Counter, the author of all three of these books, has a reputation as a hack in WH40K.
The first book, Grey Knights, is a solid story overall. Plotting worthy of a greater daemon of Tzeentch, the Imperium portrayed as the harsh and truly brutal place it is, tons of information on the GKs, and the Inquisition portrayed fairly reasonably. On the whole it was a solid and very enjoyable read.
The second book, Dark Adeptus, seemed to be going the same direction. The first 3/4s of the book were up to par with the standard set in Grey Knights and it looked to be doing well. The last 1/4 was... I have no idea. I get the distinct impression Counter ran out of ideas and just needed desperately to end the book in any way possible. He'd written up events that could drastically shift the balance of power in the 13th Black Crusade and had to protect the status quo. There are moments of awesome in it but the last 80 pages of the book brings on one WTF? after another. Details below.
Spoiler:
I haven't gotten into Hammer of Daemons yet and after the way Dark Adeptus ended I don't know if I want to.



