The 11th Company's take on codex: Knights is highly recommended, just don't listen while you're driving or anything (nice LOL's).
BTW, GW already broke their own record for "fewest units in a codex". The Knights Codex has 2 units in it, but the recently released Codex: Legion of the Damned has only 1 unit.
That's right, codex: LoTD is just a codex that consists of one or more units of legion of the damned - same rules from the Space Marine version. There's apparently not even a rule adjustment that lets them start on the board. One sarge gets to be the HQ...
Codex: Inquisition is looking better and better