For whatever reason it seems like I do better playing Omaha online than I do Hold'em. My guess is that it's the low level of play at .05/.1 tables, like the guy who told me "never bet a set, you get drawn out on too often."

I'm looking for some books on Omaha to improve my game, any suggestions?

"never bet a set, you get drawn out on too often."

I think that pretty much sums up all higher-thinking Omaha theory.