This is the first book in a series, and introduces 12-year-old criminal mastermind Artemis and the fairies he takes on. He's the only person to ever get away with fairy gold, fair and square. Well, not exactly fair but you have to start somewhere.
The fairy society that lives underground is well developed, and the rules of their magic seem well thought-out. The technology that Artemis employs seems modern, not dated (which seems like a risk when you write a book these days, it taking so long to get a book into print from when you write it).
It was funny, too. I read this with the boy, and the next day we started the next book in the series, so I guess he enjoyed it, too.
It seems strangely appropriate to me to be thinking about this book right now, because my coworkers have taken to calling my green jumpsuit my LEPrecon outfit, thinking it's some kind of a joke or a dig or an insult, I guess. However, I think I won't be dressing up as Holly Short for Halloween. I suspect I'm the only one in my immediate team who knows about the Lower Elements Police Recon unit (LEPrecon) after all. And once you make a garment part of a costume, it's always going to be part of a costume, isn't it?