Omaha h/l book advice

[IaHawk]

Looking for some advice on a good omaha h/l book. Have been playing 3/6 at my local casino for the past 3 months and have been doing very well and would like to mix it up with the 6/12 players. The thing is they only play dealers choice...but it is actually a round of each...omaha h/l and holdem. I have watched this game a couple of times and it seems like it is a pretty juicy game. I have built my bankroll up fairly high but i do not want to get in that game with out some good knowledge of omaha. I have been starting to read the posts in the omaha section but i am wanting a good book to get me started in the right direction. Thanks for any help!

IaHawk