Actually, this book deserves 3.5 stars, but I'm feeling generous today...
Understanding theory is not as important for MAKING MONEY in options trading as it is for analyzing results. However, this is a good reference book for investors, since a successful investor needs to be able to do dispassionate analysis.
This book's major flaws are:
1) Poor Editing. Some of the terminology is incorrect (e.g. "striking price") and the organization of the presentation could be improved a great deal.
2) Dry academic prose. No wonder successful business people love to bash academic types.
Personally, I'm more inclined to recommend reading books by William Eng, William O'Neill, and James P. O'Shaugnessey.