Amazon says that this book has 240 pages. Physically, that's true. Informationally, however, it's not even close. Less than half the book is actual content created by the author. The back more-than-half of the book is nothing more than page after page of charts, listing all the possible starting hands in Omaha and their calculated winning percentage based on thousands of Monte Carlo simulations. (To be fair, the author did assume a variety of player styles in the simulation runs.) No one, and I mean no one, is going to read all the pages of charts and memorize their contents. The author and publisher would have been far better served to put this information in an online addition to the book and not waste the paper that the charts are printed on.
But what's left after you remove the charts? A think book, to be sure, definitely not worth the $20 list price, and barely worth the Amazon price. Most of the content is covering a few basic types of Omaha hand, and then discussing those hands and their place in the charts, stating which hands are profitable long run based on the charts and which ones are not. while some of the thoughts are repeated too often, one concept is more overlooked, that of the cards working together. While he does touch on the concept, it's not fully fleshed out, and few hand examples really explain this concept, one of the most important of Omaha.
As a beginner to the game of Omaha, however, this book did help my game, especially in two areas. First is in the cards to look for when going for a low. Always depending on the action, of course, I almost never will go for a low without an A-2 in my hand. it's just too easy for someone to have a better low without these two cards. Second is just how bad middle cards are in an Omaha hand.
Compared to the hold 'em poker literature by writers such as Doyle Brunson, David Sklansky, Ed Miller, Tom McEvoy, Mike Caro, and even Ken Warren, the writing and the content here is pretty much middle-of-the-road. It's not bad, and if it's the first Omaha book you pick up to get started in the game, it won't do you wrong. But there's so little actual content, and what's there is so shallow, that I really can't give this book a rating better than 2 stars.