Anthony Horowitz’s books do mostly aim at younger readers, but his work, taken as a whole, aims as old if not older than the Artemis Fowl series, or indeed Percy Jackson. And some of his other books, such as The Switch, are excellent at any age. And whilst we’re talking about Artemis Fowl, Oein Colfer is a superb author, and some of his other books are definitely worth checking out. Airman is excellent, I cannot recommend it highly enough. Involving, interesting and very suitable.
