Entertaining, though I think perhaps I had out-grown the Artemis Fowl series since I last read the first four (about three years ago). This book seemed unecessary in what is a very good series, and I didn't particularly enjoy it, though the concept was good. I can't bring myself to review this book on it's own, since it appears to be a minor blip.
I would whole-heartedly recommend the series, though. A good set of books.