Artemis Fowl and the Opal Deception, known in America as Artemis Fowl: The Opal Deception, is a teen fantasy novel published in 2005, the 4th book in the Artemis Fowl series by the Irish author Eoin Colfer. Preceded by Artemis Fowl and the Eternity Code and followed by Artemis Fowl and the Lost Colony, it is centred on the brilliant pixie Opal Koboi's second try at rebellion and Artemis Fowl II and his fairy comrades' efforts to stop her. Critical reception was mixed, with some reviews praising the book and others deeming its writing poor and confusing.

Eoin Colfer is an Irish author of children's books. He worked as a primary school teacher before he became a full-time writer. He is best known for being the author of the Artemis Fowl series. In September 2008, Colfer was commissioned to write the sixth installment of the Hitchhiker's Guide to the Galaxy series, titled And Another Thing ..., which was published in October 2009. In October 2016, in a contract with Marvel Comics, he released Iron Man: The Gauntlet. He served as Laureate na nÓg between 2014 and 2016.