New Imperial Agents "Codex" vs. other books about those models...
Does the new Imperial Agents codex cancel out the Inquisition rulebook from just a couple years ago? If I wanted to make a little Inquisitorial detachment, do I HAVE to use the new Imperial Agents book?
Is GW's new notion of rule-books (codices, dataslates, etc. etc.) just to sort of use whatever current-ish version a player wants? I mean, some of the newest books seem to limit, if not directly contradict, still-definitive codices.