This is definitely not a book for advanced users in spatial statistics or a tutorial-based book of how to use spatial statistics in GIS. As the author described at the very beginning, this is an introductory book for people who have used GIS but know very little about statistics. Personally, I think this book works best if you already took your intro to GIS and basic statistic class so you already know a little bit of both. It explains how two of them can work together to solve the questions you have in mind about the real world problems.
Besides the complimentary approach, I give this book five stars because of 1) the writing style is extremely accessible. Even he does not go through all the details on statistics, the author explains the statistic concepts a lot better than any other books I have read for my statistic class. 2) the graphics, including maps and charts, are extremely helpful to compare the concepts and different methods he describes in the book. 3) the comparison between different spatial statistic are very useful if you are puzzled with different spatial statistic tools available in your ArcGIS toolbox when the "Help" is not helpful at all! 4) it gives you various reference if you are interested in exploring specific topics.
If you want to explore your data beyond thematic mapping and want to know whether the patterns you see are statistically significant or not, this is a book that will open the door of spatial statistic to you. If you are a visual person but hate statistics, this book might change that as well!