Charlotte and Peter Fiell are well-known design authors having written over 70 books on the history, theory, and criticism of design. The Fiells have lectured widely, guest taught courses, curated exhibitions, and consulted manufacturing companies, museums, salerooms, and major private collectors around the world. Together, they have written numerous TASCHEN books, including 1000 Chairs , Design of the 20th Century , Industrial Design A-Z, 1000 Lights , Scandinavian Design , and, most recently, the double-volume Ultimate Collector Cars, Ultimate Collector Motorcycles and Ultimate Collector Watches.