As one who has been digging in to WordPress for the last 4 months I can appreciate the comments "not a beginners book'. After paying a developer a heft chunk of change to build my company site (wp.org) I decided to run some stats and found very little site traffic and no referrals so I purchased two books and to figure out what I don't know and how to make the site better. The first book was pretty light but helpful and now I'm on to a second more advanced book filling in a lot of the gaps. If time permits I would like to continue to advance my learning which is how I came upon this book but with no reviews on Amazon I wanted to see what others had to say. It doesn't look like a cover-to-cover type read but rather cherry pick the chapters that might be able to help your specific case.