Not that I'm totally busted up about it, but please, please please, include entries in the indices (as I have noticed this across the entire line of WH40K books) as they pertain to the rules. Case in point, for Black Crusade, Alignment to the Powers is an important part of the game, but the general rules for determining Alignment are not referenced in the index. We do, however have an entry for "Alpha Legion" (p. 28 for the uninformed) for some strange reason…
Irritating.