The Complete Idiot's Guides is a product line of how-to and other reference books published by Dorling Kindersley (DK). The books in this series provide a basic understanding of a complex and popular topics. The term "idiot" is used as hyperbole, to reassure readers that the guides will be basic and comprehensible, even if the topics seem intimidating. The approach relies on explaining a topic step-by-step, using basic terminology, definitions of words, and profiles of people.