This was a pretty good book. It was easy reading and was all-around fun. The characters are certainly interesting. I like that the main character is Irish, in a modern setting—it's not something I see often (especially with a kid as the character).
The book is about a genius boy named Artemis Fowl who seeks to restore his family's partially depleted fortune via various criminal endeavors. His latest ploy—after discovering the existence of fairy people—is to take a fairy hostage and collect the ransom (there's more to it, but that's pretty much what it is).
Artemis' body guard is a significant character. He basically protects Artemis and assists him throughout the book. He seems to be the most well-equipped bodyguard alive.
Anyway, the fairy people (AKA 'the people', as might be expected) have progressed far beyond humans with their technology—magic isn't so much a focus in this book as you might expect with fairies and all (although it's certainly there). Artemis knows the rules that the fairies (which also include elves, gnomes, centaurs and who knows what else) have to follow in order to keep their magic, as well as the rules of the LEP, apparently (that's basically the force in charge of making sure the fairies in their underground world aren't discovered and/or exploited by humans; they seem like the government, sort of). Things get interesting.
I liked the book. It was clean, too. I could recommend it to pretty much anyone who can handle the fairy setup (some adults might not take well to fairies working in a modern-style military-style force with advanced technology).
Interesting note: After listening to the book, I checked out the script of the graphic novel seems to be pretty much exactly, if not exactly, like the original novel. So, you shouldn't be missing out on details if you get the graphic novel instead.