"DK Online" provides complete and visually arresting reference at a new level. Topics are presented thematically, on double-page spreads, in a clear and logical progression - ending with a comprehensive glossary and index. Reference pages provide a clear and compelling overview of each topic. On every page, a range of ready-reference tools deliver information at a glance: databoxes, timelines, annotated and step-by-step photography, digital images, and artworks. Link icons lead you to online information you can"t get in a book: live and archive footage; sound buttons; interactive polls, quizzes, and games; links to organizations and the latest research. Each link icon tells you which keyword to key in - then Google(t) and "DK" take you straight to the safe, appropriate, and authoritative online information, and ensure that all weblinks are regularly monitored and updated.