Artemis Fowl is a series of books about the teenage criminal mastermind of the same name. It's a darker affair compared to the likes of Too Ghoul for School, and rightly so considering these books are aimed at the 'tweenie' age group, 10-13. Despite being a child, Artemis Fowl is quite ruthless as is shown in the first book where he kidnaps a member of the reconnaissance unit of the fairy police force. Think of Artemis Fowl as an anti hero of sorts with some of the moral quandaries later in the series blurring the lines between right and wrong. No surprise then that kids love their sense of adventure and moral ambiguity.