I have all three Artemis Fowl books on my desk right now. All of them are excellent. "The Eternity Code" (the third one) is my personal favorite. Though here is one of my favorite excerpts from the first book:
A waiter scurried to their table.
"More tea, sirs?" he asked, head bobbing furiously.
Artemis sighed. "Spare me the theatrics, and sit down."
The waiter turned instinctively to Butler, who was
after all, the adult.
"But, sir, I am the waiter."
Artemis tapped the table for attention.
"You are wearing handmade loafers, a silk shirt, and
three gold signet rings. Your English has a tinge of Oxford
about it, and your nails have the soft sheen of the recently
manicured. You are not a waiter. You are our contact
Nguyen Xuan, and you have adopted this pathetic disguise
to discreetly check for weaponry."
Nguyen's shoulders sagged. "It is true. Amazing."
"Hardly. A ragged apron does not a waiter make."
Nguyen sat, pouring some mint tea into a tiny china cup.
"Let me fill you in on the weapons status," continued
Artemis. "I am unarmed. But Butler here, my...ah...
butler, has a Sig Sauer in his shoulder holster, two shrike-
throwing knives in his boots, a derringer two-shot up his
sleeve, garrotte wire in his watch, and three stun grenades
concealed in various pockets. Anything else, Butler?"
"The cosh, sir."
"Oh, yes. A good old ball bearing cosh stuffed down
his shirt."
Nguyen brought the cup trembling to his lips.
The kids will love that.
Edit: Didn't realize that there were 5 books. I do not have The Opal Deception or The Lost Colony. Kind of grew out of them...