The booklet is great. So is FASDIU II. So is his Side Steal DVD. Very good, in fact. If you don't know the side steal very well, I would suggest getting the DVD and on it are several of his tricks from his books. If you decide you like the tricks on the DVD, then get his books.
On the other hand, if you already know a dozen or so card tricks that you already have perfected and can perform flawlessly right off the top of your head, from a shuffled deck then what are you doing looking for more card tricks?
Perhaps you know enough already? If so, this would allow you to move on to a different area of magic and work on that.