Hi
@Quinine good question. Unfortunately there isn't really a good answer anymore since as far as I know, all the truly beginner PLO books are so outdated that if you followed the advice in them you would be a losing player in today's PLO games.
For an absolute PLO noobie, I think the best way to get a general knowledge of the game quickly is to watch videos. Fortunately, as Jon mentioned, there are some videos on PokerVIP from
@Kyyberi along with a few others. And I have some videos that will be coming soon so you can get into the mind of a mid-high stakes PLO player and hopefully come away with some actionable advice to help you in your PLO journey.
Hope that helps!